Question

A metal wire connected across a 10V power supply dissipates 1000 J of heat in one and half minutes. what is resistance of wire?​

Answer 1

Answer:

Explanation:

H = V²Rt (Joules Heating Effect )

1000 J = (10)²R(90)

1000J = 100 x 90 (R)

1000J = 9000 R

1000/9000 = R

1/9 = R

R = 0.11Ω

Answer 2

Answer:

the answer is 9Ω

Explanation:

use the formula $H=\frac{V^2}{R}t$