Question

A current of 2 A, passing through a conductor produces 80 J of heat in 10 seconds. The resistance of the conductor in ohm is

• A. 0.5
• B. 2
• C. 4
• D. 20

Answer 1

Answer: (B)

2

Answer 2

$H=I^2Rt$ or $R =\frac{H}{(I^2 t)}=\frac{80}{(2^2 \times 10)} = 2\, \Omega$