Question

Find the time required in minutes to produce 2400 cal of heat when a current of 1 ampere flows through a wire of resistance 4.18 ohm

Answer 1

Hi,

T =?
W =2400cal = (2400*4.18)J
I = 1 A
R = 4.18 ohm

V = IR
=> V = 1 * 4.18
= 4.18 Volts

V = W/Q
=>4.18 = (2400*4.18)/Q
=>Q = 2400 C

I =Q /T
=>1 A= 2400C /T
=>T = 2400s = 40 minutes

Ans : the time taken is 40 minutes.

Hope this is helpful :)

Answer 2

Answer:

20 minutes ans of this question