Question

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

Answer:

Given

VOLTAGE= 3VOLTS

CURRENT= 1= 600ma= 600/1000= 0.6A

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

P=?

R= ?

E= ?

A) CALCULATE POWER:

BY USING FORMULA, P= V*I

3*0.6

=1.8w

B) CALCULTE RESISTANCE:

BY USING FORMULA, V=IR

R= V/I

3/0.6

3*10/6

5ojms

C) CALCULATE ENERGY:

FORMULA: E= P×T

1.8×14400

25920 joules.

Explanation:

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