Quiz
Electromagnetics (Kahoot Review)
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Perguntas do quiz (29)
1The electric potential inside an isolated conductor could be ___________
- AZero
- BChanging
- CConstant
- Dmore than one of the choices
2Pushing a positively charged particle towards another fixed positively charged particle.
- Aexerts negative work
- Bexerts positive work
- Cexerts no work
3The electric flux trough a closed surface depends on the following except ________.
- Amagnitude of the charged enclosed by the surface
- Bthe shape of the surface
- Cmagnitude of the charged outside the surface
- Dmore than one of the choices
4The net torque on a current loop subjected to a magnetic field is _________
- Anever zero
- Balways zero
- Csometimes zero
- Dcannot be determined
5The electric field outside a coaxial cable mus be _________
- Azero
- Bmaximum
- Csame as E field inside the inner conductor
- Dmore than one of the choices
6The delayed reaction of the magnetization with the change of magnetizing force is called ______
- Apolarization
- Bhysteresis
- Cmagnetization
- Drelaxation time
7The magnetic force must be zero when the velocity is ________
- Aperpendicular to B
- Bzero
- Cparallel to B
- Dmore than one of the choices
8The electric flux through a surface will be zero when the angle between the electric field and the area unit vector is _______
- A0 degrees
- B30 degrees
- C180 degrees
- D90 degrees
9The polarization vector has the same unit as the __________
- Aelectric flux
- Belectric field
- Celectric flux density
- Delectric potential
10Two parallel wires are said to have one Ampere if the force per unit length experienced by the wire is _________
- A2 x 10^-7 N/m
- B2 x 10^7 N/m
- C2 x pi x 10^7 N/m
11The capacitance of an isolated spherical capacitor is independent on its
- Aradius
- Bpotential
- Ccharged
- Dmore than one of the choices
12The movement of charges in a vacuum
- Ais a form of conduction current
- Bdoes not obey Ohm's law
- Cis electrostatically neutral
- Dmore than one of the choices.
13Inductors _____________ variations in __________ through a circuit.
- Aoppose; current
- Boppose; voltage
- Caid; current
- Daid; voltage
14The following are always zero for a conductor in electrostatic equilibrium except
- Anet current
- Bnet electric field
- Csurface charge density
- Dpotetial difference
15A material with higher residual magnetism is said to have a good __________, which is the ability to retain magnetism when magnetizing force to removed
- Ahysteresis
- Bremanence
- Cmagnetization
- Ddipole moment
16The energy density of an electric field is ________ the energy density of the magnetic field in a vacuum.
- Aequal to
- Bgreater than
- Cless than
17Which of the following is a unit of magnetic field intensity?
- Amaxwell
- Btesla
- Cgauss
- Doersted
18If the current in a parallel conductor are the same, the 2 conductors will
- Aattract
- Beither repel or attract
- Crepel
- Dneither attract nor repel
19If a test charge is moved on an equipotential surface there is
- Azero work
- Bnegative work
- Cpositive work
- Da change in potential energy
20The charge in the plates of a capacitor establish _____
- ACurrent
- BElectric Field
- CPotential difference
- Dmore than one of the choices
21With steady electric current, as the velocity increases , the charge density ___________
- Aincreases
- Bremains the same
- Cdecreases
- Dbecomes zero
22A point charge Qa is moved aong a circular loop around another fixed point charge Qb at a distance of constant radius. The work done is zero ______
- Awhen the 2 charges have the same magnitude
- Bwhen the 2 charges have the same poalarity
- Cwhen the 2 charges have opposite polarity
- Dall of the choices
23Resistance depends on the following except
- Adimension
- Bboth the choices
- Cmaterial
- Dneither of the choices
24The following statements implies that charges are conserved except
- Acharges exist as exact multiple of the charge electron
- Bthe smallest quantity of charge is the charge of an electron
- Calgebraic sum of all charges in a closed system is constant
- Dmore than one of the choices
25A flux of 10^-8 weber is passing through a surface. There must be ______ magnetic field line/s passing through it.
- A10^8
- B1
- C10^-8
- D0
26When the charge on the plate increases, the capacitance ______
- Aincreases
- Bdecreases
- Cremains the same
27If the charges are the same, the forces must be ________.
- Aattractive
- Bzero
- Crepulsive
- Dcannot be determined
28The electric field at 4m due to an infinite sheet of charge is ___________ that of the electric field at 8m.
- Ahalf
- Btwice
- Cfour times
- Dthe same
29COnductance is to electric circuits as _______ is to magnetic circuit
- Amagnemotive force
- Bmagnetic flux
- Cpermeance
- Dpermeability
Informações
- Descrição
- Electromagnetics FInals Period Kahoot Quiz
- Autor
- John Anthony Yumul
- Idioma
- English
- Visualizações
- 281
- Histórico
- Criado em 28 mai 2018 · atualizado em 28 mai 2018
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