Current Electrici… | NUST Entrance Test Physics

The free electrons in metals:

Difficulty: Hard

A:

Are in random motion and their speed depends upon temperature

B:

Move in a particular direction

C:

Move with speed of light

D:

Move such that their speed does not depend upon temperature

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

Difficulty: Easy

A:

Greater than the speed at which they pass from left to right

B:

Less than the speed at which they pass from left to right

C:

The same at which they pass from left to right

D:

Any of above

If the ends of a wire are connected to a battery, an electric field E will be set up at:

Difficulty: Easy

A:

The ends of the wire only

B:

Mid point of the wire only

C:

Every point within the wire

D:

At nodes only

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