Question

Consider a resistor of uniform cross sectional area connected to a battery of zero internal resistance. If the length of the resistor is doubled by stretching it then

• A. current will becomes four times.
• B. the electric field the wire will become half.
• C. the thermal power produced by the resistor will become one fourth.
• D. the product of the current density and conductance will become half.

Answer 1

The correct option is B the electric field the wire will become half.

Hence, option $B$ is correct answer.