Question

A metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (for example, by cooling it), the current will
(a) increase
(b) decrease
(c) remain constant
(d) become zero

Answer 1

• If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (by cooling it) then the current will be increase.
• If the number of collisions of the free electrons is decreased then drift velocity will increase.
• And we know that current is directly proportional to the drift velocity. Hence current will also increase.
• In other way we can say that if the electrons motion is slowed down by cooling it which means there will be less collisions between the electrons.
• When there is less collisions then alignment of the electrons will be better which increases the drift velocity.

Regards

Answer 2

Answer:

a

Explanation:

metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice some how decreases in the resistor, then the current will