Question

URGENTLY.........

13. A torch bulb is rated at 3V and 600mA. Calculate it's
(a) Power b) Resistance c) Energy consumed if it is lighted for 4 Hrs.​

Answer 1

Given:

VOLTAGE= V= 3 VOLTS

CURRENT= I = 600 mA= 600/1000=0.6 A.

Time=4hrs=4*60*60=14400seconds

P=?

R=?

E=?

A) CALCULATE POWER:

BY USING FORMULA, P= V*I

=3 *0.6

=1.8 W

B) CALCULATE RESISTANCE:

BY USING FORMULA, V=IR

R=V/I

=3/0.6

=3*10/6

=5ohms

C) CALCULATE ENERGY:

FORMULA: E= P x t

= 1.8 x 14400

=25920 Joules