Question

40. A torch bulb is rated 2.5 V and 750 mA. Calculate (i) its power, (ii) its resistance and (iii) the energy consumed, if this bulb is lighted for four hours.​

Answer 1

Answer:

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Answer 2

Answer:

Correct option is

A

1.87 ,3.33,27000

(1) Power is given by P=VI=2.5×0.75=1.875W

(2) Resistance is given by R=

I

V

=

0.75

2.5

=3.33Ω

(3) Time Given=4hr=4×60×60sec

=14400sec

Energy Consumed E=Pt

=1.875×14400

=27000J