1) A positive charge Q is allowed to move on an equipotential surface of 5000 V

Question

1) A positive charge Q is allowed to move on an equipotential surface of 5000 V and again allowed to move on an equipotential surface of 5 V. The amount of work done to move in first case compared to the second case is

dependent on distance travelled.

9.9 x 10-4 J

3)You use multi meter to measure resistance of a wire and found that it was 0.532 ?. You also found that the length of the wire is 100 m and it has a diameter2.00 mm. What is the resistivity of the wire is made?

the same. less. more.

dependent on distance travelled.

2) You are making a parallel plate capacitor using a dielectric with value 3.5. The plates are circular with radius 0.07m, and the separation gap is 0.375mm. What energy may be stored in this capacitor if 1250V is the applied voltage? 3.5 x 10-3J 2.0 x 10-3J 2.8 x 10-4J

9.9 x 10-4 J

3)You use multi meter to measure resistance of a wire and found that it was 0.532 ?. You also found that the length of the wire is 100 m and it has a diameter2.00 mm. What is the resistivity of the wire is made?

1.59

Explanation / Answer

eqipotential surfae is potential is same everywhere

now work done between two points=potential difference between two points*distance between two points

in both cases we have equipotential surface

so

potential difference between two points is zero in both cases

so work done=0 in both cases

that is work done is same in both cases which is equal to zero

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