Physicsmedium · Past Paper
If the length of a wire is doubled and its cross-sectional area is kept constant, its resistance will:
ARemain same
BBecome half
CBecome double
DBecome four times
✓ Correct Answer: C — Become double
Resistance is directly proportional to length (R ∝ L). Doubling length doubles resistance.
Share this question
More from Physics
- A racing car has a uniform acceleration of 4 m/s^2. What distance will it cover in 10s after start?
- A body is moving with constant acceleration. If the distances traveled in 'p'th and 'q'th seconds are 'x' and 'y' respectively, then the acceleration is:
- A crane lifts a load of 1000 N through a vertical height of 10 m in 5 seconds. Its power is:
- Upthrust is exerted by:
- Power is defined as: