PhysX #1 bugaga

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Frage 1 von 40

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and
velocity?

Wähle eine der folgenden:

The position and velocity are both positive
The position and velocity are both negative
The position is positive, and the velocity is zero
The position is positive and the velocity is negative
The position is negative, and the velocity is positive

Erklärung

Frage 2 von 40

Which of the following statements is not true regarding a mass- spring system that moves with simple harmonic motion in absence of friction?

Wähle eine der folgenden:

The total energy of the system remains constant
The energy of the system is continually transformed between kinetic and potential energy
The total energy of the system is proportional to the square of the amplitude
The potential energy stored in the system is greatest when the mass passes through the equilibrium position.

Erklärung

Frage 3 von 40

When a thin uniform stick of mass M and length L is pivoted about its midpoint, its rotational inertia is ML^2/12. When pivoted about a parallel axis through one end, its rotational inertia is:

Wähle eine der folgenden:

ML^2/12
ML^2/6
ML^2/3
7ML^2/12
13ML^2/12

Erklärung

Frage 4 von 40

A baseball of mass m is thrown upward with some initial speed. A gravitational force is exerted on the ball

Wähle eine der folgenden:

At all points in its motion
At all points in its motion except at the highest point
At no points in its motion
Only at downward part of its direction

Erklärung

Frage 5 von 40

The kinetic friction will always be

Wähle eine der folgenden:

Greater than static friction
Equal to the static friction
Less than static friction
Negative

Erklärung

Frage 6 von 40

Centripetal acceleration and tangential acceleration are always __________.

Wähle eine der folgenden:

Parallel to Each other, but in opposite direction
Perpendicular to each other
None of these
Parallel to Each other, but in the same direction

Erklärung

Frage 7 von 40

The dimensions of angular momentum are __________.

Wähle eine der folgenden:

MLT^-1
MLT^-2
ML^2T^-2
ML^2T^-1

Erklärung

Frage 8 von 40

Two waves have the same frequency. Which wave characteristic must also be identical for both waves?

Wähle eine der folgenden:

Phase
Amplitude
Intensity
Period

Erklärung

Frage 9 von 40

A mechanical wave generally does NOT

Wähle eine der folgenden:

Move the medium from one place to another
Move through a medium
Move through solids
Disturb the medium

Erklärung

Frage 10 von 40

Which statements are correct?

Wähle eine der folgenden:

Charges of opposite sign attract one another and charges of the same sign repel one another. Total charge in an isolated system is conserved. Charge is quantized.
Charges of opposite sign repel one another and charges of the same sign attract one another.Total charge in an isolated system is conserved. Charge is quantized.
Charges of opposite sign attract one another and charges of the same sign repel one another. Total charge in an isolated system is not conserved. Charge is quantized
Charges of opposite sign repel one another and charges of the same sign attract one another. Total charge in an isolated system is ot conserved. Charge is not quantized.
No correct answer

Erklärung

Frage 11 von 40

Which statements are correct?

Wähle eine der folgenden:

Conductors are materials in which electrons move freely. Insulators are materials in which electrons do not move freely.
Insulators are materials in which electrons move freely. Conductors are materials in which electrons do not move freely.
Conductors are materials in which electrons don’t move freely. Insulators are materials in which electrons move freely.
All answers are correct
No correct answer

Erklärung

Frage 12 von 40

If the electric field is uniform and makes an angle θ with the normal to a surface of area A, the electric flux through the surface is:

Wähle eine der folgenden:

Φ = EAcosθ
Φ = EAsinθ
Φ = Acosθsinθ
Φ = Ecosθ
No correct answer

Erklärung

Frage 13 von 40

A conductor in electrostatic equilibrium has the following properties:

Wähle eine der folgenden:

1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely on its surface.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is greatest where the radius of curvature of the surface is the smallest.
1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides partially on its surface, partially inside the conductor.
3) The electric field just outside the conductor is parallel to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge
density is greatest where the radius of curvature of the surface is the smallest.
1) The electric field is non zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely on its surface.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is greatest where the radius of curvature of the surface is the biggest.
1) The electric field is zero everywhere inside the conductor.
2) Any net charge on the conductor resides entirely inside the conductor.
3) The electric field just outside the conductor is perpendicular to its surface and has a magnitude σ/ε0, where σ is the surface charge density at that point.
4) On an irregularly shaped conductor, the surface charge density is smallest where the radius of curvature of the surface is the smallest.
No correct answer

Erklärung

Frage 14 von 40

When a positive test charge q0 is moved between points A and B in an electric field E, the change in the potential energy of the charge–field system is:

Wähle eine der folgenden:

1
2
3
4
No correct answer

Erklärung

Frage 15 von 40

The potential difference ΔV between points A and B in an electric field E is defined as:

Wähle eine der folgenden:

1
2
3
4
No correct answer

Erklärung

Frage 16 von 40

The potential difference between two points A and B in a uniform electric field E, where s (d=|s|) is a vector that points from A to B and is parallel to E is:

Wähle eine der folgenden:

ΔV = -Ed
ΔV = 0
ΔV = Ed
ΔV = -Edsinθ
No correct answer

Erklärung

Frage 17 von 40

Which statements are correct?

Wähle eine der folgenden:

An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are perpendicular to electric field lines.
An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are parallel to electric field lines.
An equipotential surface is one on which all points are not at the same electric potential. Equipotential surfaces are perpendicular to electric field lines.
An equipotential surface is one on which all points are at the same electric potential. Equipotential surfaces are perpendicular to gravitation field lines.
No correct answer

Erklärung

Frage 18 von 40

If we define V = 0 at rA = ∞ the electric potential due to a point charge at any distance r from the charge is:

Wähle eine der folgenden:

V = kq/r
V = kq^2/r
V = kq/r^2
V = q/r
No correct answer

Erklärung

Frage 19 von 40

The potential energy associated with a pair of point charges separated by a distance r12 is:

Wähle eine der folgenden:

1
2
3
4
No correct answer

Erklärung

Frage 20 von 40

The electric potential due to a continuous charge distribution is:

Wähle eine der folgenden:

1
2
3
4
No correct answer

Erklärung

Frage 21 von 40

The electric dipole moment p of an electric dipole has a magnitude:

Wähle eine der folgenden:

p = 2aQ
p = Q
p = Q^2
p = -2aQ
No correct answer

Erklärung

Frage 22 von 40

The torque acting on an electric dipole in a uniform electric field E is:

Wähle eine der folgenden:

τ = pxE
τ = p·E
τ = p/E
τ = qpxE
No correct answer

Erklärung

Frage 23 von 40

The potential energy of the system of an electric dipole in a uniform external electric field E is:

Wähle eine der folgenden:

U = - p·E
U = pxE
U = p·E
No correct answer
U = p/E

Erklärung

Frage 24 von 40

The average current in a conductor is related to the motion of the charge carriers through the relationship:

Wähle eine der folgenden:

I = nqvA
I = nqv
I = qvA
I = nq/vA
No correct answer

Erklärung

Frage 25 von 40

Ohm’s law in the differential form is:

Wähle eine der folgenden:

J = σE
I = U/R
I = R/U
J = σ/E
No correct answer

Erklärung

Frage 26 von 40

Ohm’s law in the integral form is:

Wähle eine der folgenden:

J = σE
I = U/R
I = R/U
J = σ/E
No correct answer

Erklärung

Frage 27 von 40

The power supplied to the element, is:

Wähle eine der folgenden:

P = IΔV
P = I/ΔV
P = I^2ΔV
P = IΔV^2
No correct answer

Erklärung

Frage 28 von 40

The power delivered to a resistor can be defined as:

Wähle eine der folgenden:

P = I^2R
P = IR
P = IR^2
P = I^2/R
No correct answer

Erklärung

Frage 29 von 40

Circuits involving more than one loop are conveniently analyzed with the use of Kirchhoff’s rules:

Wähle eine der folgenden:

1) The sum of the currents entering any junction in an electric circuit must equal the sum of the
currents leaving that junction.
2) The sum of the potential differences across all elements around any circuit loop must be zero
1) The product of the currents entering any junction in an electric circuit must equal the
sum of the currents leaving that junction.
2) The sum of the potential differences across all elements around any circuit loop must be constant.
1) The sum of the currents at any circuit loop must be zero.
2) The sum of the potential differences across all elements around any circuit loop must be zero.
1) The sum of the currents entering any junction in an electric circuit must equal the sum of the currents leaving that junction.
2) The product of the potential differences across all elements around any circuit loop must be zero.
No correct answer

Erklärung

Frage 30 von 40

Two objects, with different sizes, masses, and temperatures, are placed in thermal contact. Energy travels

Wähle eine der folgenden:

From the larger object to the smaller object
From the object with more mass to the one with less
From the object at higher temperature to the object at lower temperature
Energy doesn’t travel
From the object at lower temperature to the object at higher temperature

Erklärung

Frage 31 von 40

The second law of thermodynamics can be given as __________

Wähle eine der folgenden:

For any spontaneous process, the entropy of the universe increases
The entropy of a pure crystalline substance at absolute zero is zero
ΔS = Q/T at constant temperature
ΔE = Q + W

Erklärung

Frage 32 von 40

How does the internal energy of an ideal gas change as it follows path i->f in figure?

Wähle eine der folgenden:

E(int) increases
E(int) decreases
E(int) stays the same
There is not enough information to determine how E(int) changes

Erklärung

Frage 33 von 40

How does the internal energy of an ideal gas as it follows path f->f' along the isotherm labeled T + ΔT in figure ?

Wähle eine der folgenden:

E(int) increases
E(int) decreases
E(int) stays the same
There is not enough information to determine how E(int) changes

Erklärung

Frage 34 von 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The average translational kinetic energy per molecule in container B is

Wähle eine der folgenden:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine.

Erklärung

Frage 35 von 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The internal energy of the gas in container B is

Wähle eine der folgenden:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine

Erklärung

Frage 36 von 40

Two containers hold an ideal gas at the same temperature and pressure. Both containers hold the same type of gas but container B has twice the volume of container A. The rms speed of the gas molecules in container B is

Wähle eine der folgenden:

Twice that for container A
The same as that for container A
Half that for container A
Impossible to determine

Erklärung

Frage 37 von 40

The molar specific heat of a gas is measured at constant volume and found to be 11R/2. The gas is most likely to be

Wähle eine der folgenden:

Monatomic
Diatomic
Monatomic or diatomic, depends on the conditions
Polyatomic
All answers are incorrect

Erklärung

Frage 38 von 40

Parallel wires carrying currents I1 and I2 respectively

Wähle eine der folgenden:

Repel if they are directed opposite
Will attract if they are directed opposite
Will not interact

Erklärung

Frage 39 von 40

A material that can be permanently magnetized is generally said to be

Wähle eine der folgenden:

Magnetic
Electromagnetic
Permanently magnetic
Ferromagnetic

Erklärung

Frage 40 von 40

The magnetic flux around a straight currentcarrying wire

Wähle eine der folgenden:

Gets stronger with increasing distance from the wire
Is strongest near the wire
Does not vary in strength with distance from the wire
Consists of straight lines parallel to the wire

Erklärung

Antwort prüfen

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Quiz

PhysX #1 bugaga

Frage 1 von 40

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and velocity?

Wähle eine der folgenden:

Erklärung

Frage 2 von 40

Which of the following statements is not true regarding a mass- spring system that moves with simple harmonic motion in absence of friction?

Wähle eine der folgenden:

Erklärung

Frage 3 von 40

When a thin uniform stick of mass M and length L is pivoted about its midpoint, its rotational inertia is ML^2/12. When pivoted about a parallel axis through one end, its rotational inertia is:

Wähle eine der folgenden:

Erklärung

Frage 4 von 40

A baseball of mass m is thrown upward with some initial speed. A gravitational force is exerted on the ball

Wähle eine der folgenden:

Erklärung

Frage 5 von 40

The kinetic friction will always be

Wähle eine der folgenden:

Erklärung

Frage 6 von 40

Centripetal acceleration and tangential acceleration are always __________.

Wähle eine der folgenden:

Erklärung

Frage 7 von 40

The dimensions of angular momentum are __________.

Wähle eine der folgenden:

Erklärung

Frage 8 von 40

Two waves have the same frequency. Which wave characteristic must also be identical for both waves?

Wähle eine der folgenden:

Erklärung

Frage 9 von 40

A mechanical wave generally does NOT

Wähle eine der folgenden:

Erklärung

Frage 10 von 40

Which statements are correct?

Wähle eine der folgenden:

Erklärung

Frage 11 von 40

Which statements are correct?

Wähle eine der folgenden:

Erklärung

Frage 12 von 40

If the electric field is uniform and makes an angle θ with the normal to a surface of area A, the electric flux through the surface is:

Wähle eine der folgenden:

Erklärung

Frage 13 von 40

A conductor in electrostatic equilibrium has the following properties:

Wähle eine der folgenden:

Erklärung

Frage 14 von 40

When a positive test charge q0 is moved between points A and B in an electric field E, the change in the potential energy of the charge–field system is:

Wähle eine der folgenden:

Erklärung

Frage 15 von 40

The potential difference ΔV between points A and B in an electric field E is defined as:

Wähle eine der folgenden:

Erklärung

Frage 16 von 40

The potential difference between two points A and B in a uniform electric field E, where s (d=|s|) is a vector that points from A to B and is parallel to E is:

Wähle eine der folgenden:

Erklärung

Frage 17 von 40

Which statements are correct?

Wähle eine der folgenden:

Erklärung

Frage 18 von 40

If we define V = 0 at rA = ∞ the electric potential due to a point charge at any distance r from the charge is:

Wähle eine der folgenden:

Erklärung

Frage 19 von 40

The potential energy associated with a pair of point charges separated by a distance r12 is:

Wähle eine der folgenden:

Erklärung

Frage 20 von 40

The electric potential due to a continuous charge distribution is:

Consider a graphical representation (Fig.) of simple harmonic motion as described mathematically by equation. When the particle is at point A on the graph, what can you say about its position and
velocity?