Question

A silicon wire is connected across a cell of constant emf. As the temperature of the wire is increased, the current in the circuit will,

• A. increase
• B. decrease
• C. remain unchanged
• D. stop flowing

Answer 1

The correct option is A increase

As temperature of silicon is increased, its resistance decreases.

Now, according to Ohm's law, $I=\frac{V}{R}$

Here, $V$ is constant, $R$ is decreasing and so, the current in the circuit will increase.

Hence, $\left(A\right)$ is the correct answer.