Choose true or false for each statement regarding the resistance of a wire.

1. The resistivity depends on the temperature of most metal wires.

2. While maintaining a constant voltage V, the current I increases when the length L of a wire decreases.

3. While maintaining a constant voltage V, the current I increases when the resistivity rho of a wire increases.

Question

Physics

Desiree Cortez

10 November, 14:51

Choose true or false for each statement regarding the resistance of a wire.

1. The resistivity depends on the temperature of most metal wires.

2. While maintaining a constant voltage V, the current I increases when the length L of a wire decreases.

3. While maintaining a constant voltage V, the current I increases when the resistivity rho of a wire increases.

+5

Answers (1)

Know the Answer?

Pooch · Answer 1

1. True

2. True

3. False

Explanation:

According to Ohm's law, V = IR where V is the voltage, I is the current and R is the resistance. So if V is constant, R is inversely proportional to I

1. The resistivity of metal wires would depend on the temperature, this is true.

2. When length L of a wire decreases, the resistance R decreases as well, this would make I increase.

3. When the resistivity increases, resistance R increases as well, this would make I decrease.