The temperature coefficient of resistance of a wire is 0 00125 per degree celsius At 300 K temperature - Physics - Current Electricity

Question

The temperature coefficient of resistance of a wire is 0 00125
per degree celsius At 300 K temperature its resistance is 1 ohm The
resistance of the wire will be 2 ohm at:

(a) 1154 K
(b) 1100 K
(c) 1400 K
(d) 1127 K

Neha Gupta · Accepted Answer

Resistance in terms of temperature is given by:

Rt = R0(1+αt)where Rt : resistance at temperature tR0 :
resistance at temperature O kα : temp coefficeint

1 = Ro(1+(0 00125×300)) ---- (1)2 = Ro(1+0 00125t')
----(2)

divide equation 1 and 2 we get

t' = 1400 K

The temperature coefficient of resistance of a wire is 0.00125 per degree celsius . At 300 K temperature its resistance is 1 ohm. The resistance of the wire will be 2 ohm at: (a) 1154 K (b) 1100 K (c) 1400 K (d) 1127 K

The temperature coefficient of resistance of a wire is 0.00125 per degree celsius . At 300 K temperature its resistance is 1 ohm. The resistance of the wire will be 2 ohm at:

(a) 1154 K

(b) 1100 K

(c) 1400 K

(d) 1127 K