Question

A current 0.2A flows through a wire whose ends are at a potential difference of 15V. Calculate:
(I) the resistance of the wire , and
(2) the heat energy produced in 1minute

Answer 1

Answer:

(1) Here the resistance is 75 ohm

(2) Here the heat produced is 180 joule.

Explanation:

Here I=0.2A ,V=15V,t=1min=60 sec and r=? and H=?

(1)using V=Ir formula

(2)using H=I^2 rt

Answer 2

Answer:

1) V=IR (OHM'S LAW)

R=V/I

V=15V

I=0.2

R=15/0.2

R=75

2) H=I^2.R.t

H=0.04*75*1

H=3 J.