List of top Physics Questions on Resistance asked in BCECE

The temperature co-efficient of resistance of a wire is 0.00125/°C. Its resistance is 1Ω at 300 K. At what temperature, its resistance will be 2Ω?

A letter 'A' is constructed of a uniform wire with resistance 1.0 Ω cm^-1. The. 110 sides of the letter are 20 cm and the cross-piece in the middle is 10 cm long. The apex angle is 60°. The resistance between the ends of the legs is