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exam 2 old

hank fournier 15 questions

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Questions in this quiz (15)

  1. 1If a capacitor has a capacitance of 10.2 µF and we wish to lower the potential
    difference across the plates by 60.0 V, how much charge will we have to remove?
    1. A10.2 µC
    2. B612 C
    3. C10.2 C
    4. D0.17 µC
    5. E612 µC
  2. 2Consider the assembly of capacitors shown here. Let C 1 = C 2 = C 3 = C 4 = 10 mF. What
    is the equivalent capacitance of this circuit?
    1. A40 mF
    2. B7.5 mF
    3. C15 mF
    4. D20 mF
    5. E30 mF
  3. 3Suppose that three points are set at equal (large) distances r from the center of an
    electric dipole. Point 2 is on the dipole axis above the positive charge, point 1 is on the
    axis below the negative charge, and point 3 is on a perpendicular bisector through the line
    connecting the two charges. Rank the points according to the electric potential of the
    dipole shown, greatest (most positive) first.    Image for question 3
    1. A1, 2, 3.
    2. B3, 1, 2
    3. C2, 1, 3
    4. D2, 3, 1
    5. EAll have the same value
  4. 4What is the magnitude of the electric field at the point (3.0i − 2j + 4k) m if the electric
    potential is given by V = 2.00 xyz^2 , where V is in volts and x, y, and z are in meters?    Image for question 4
    1. A125.3 V/m
    2. B150.1 V/m
    3. C175.5 V/m
    4. D98 V/m
    5. E225.5 V/m
  5. 5In the figure below, two parallel-plate capacitors A and B are connected in parallel
    across a 600 V battery. Each plate has area 80.0 cm 2 ; the plate separations are 3.00 mm.
    Capacitor A is filled with air; capacitor B is filled with a dielectric of dielectric constant κ
    = 2.60.

    What is the free charge density σ (in C/m 2 ) on the higher-potential plate of capacitor B?    Image for question 5
    1. A7.50e-6
    2. B5.75e-8
    3. C2.50e-6
    4. D4.60e-6
  6. 6How much work (in Joules) is required to set up an arrangement of two negative
    charges and two positive charges, with each of the charges located individually at one of
    the corners of a square of side a? The two positive charges are located diagonally across
    from each other, as are the two negative charges. The magnitude of each of the charges
    is q = 2.30 pC, while the length of each side is a = 64.0 cm. The particles are initially
    infinitely far apart and at rest?    Image for question 6
    1. A- 1.92e-13
    2. B+1.92e-13
    3. C+ 6.21e-13
    4. D– 6.21e-13
    5. E– 3.77e-13
  7. 7In an ionic solution, sodium ions (positively charged) are moving to the right and
    chlorine ions (negatively charged) are moving to the left. In which directions are the
    currents due to the motions of the sodium ions and chlorine ions?
    1. ABoth are to the right.
    2. BCurrent due to sodium ions is to the left; current due to chlorine ions is to the
      right.
    3. CCurrent due to sodium ions is to the right; current due to chlorine ions is to the
      left.
    4. DBoth are to the left.
    5. ENone of the above.
  8. 8A portion of a circuit is shown, with the values of the currents given for some
    branches. What is the direction and value of the current i?    Image for question 8
    1. Adown, 6A
    2. Bup, 6A
    3. Cdown, 4A
    4. Dup, 4A
    5. Edown, 2A
  9. 9A parallel-plate capacitor C has a charge Q. The actual charges on its plates are:
    1. AQ, Q
    2. BQ/2, Q/2
    3. CQ, –Q
    4. DQ/2, –Q/2
    5. EQ, 0
  10. 10During the 4.0 min that a 5.0A current flows in a wire, how many electrons pass
    through any cross section along the wire?
    1. A7.5e21
    2. B4.2e19
    3. C5.7e19
    4. D3.1e18
    5. E9.7e20

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Quiz on exam 2 old, created by hank fournier on 26/06/2018.
Language
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