Question

1. A 12 V automobile light is rated at 30 W. The total charge that
flows through the filament in one minute is
(a) 30C
(b) 12 C
(c) 150 C
(d) 180 C
​

Answer 1

➠ Given :-

A 12 V automobile light is rated at 30 W.

➠ To find :-

The total charge that flows through the filament in one minute is ...

➠ solution :-

power dissipation through automobile light is given by,

P = Vi

• P = 30W
• V = 12 volts

so, i = 30/12

= 10/4

= 2.5 Ampere.

we know, current is the charge flows through a wire in a specific time. in short, current is the ratio of charge flows through wire to time taken.

so, i = Q/t

• i = 2.5 A
• t = 1 min = 60 sec

so, Q = it = 2.5 A × 60 sec = 150 C

Therefore the total charge that flows through the filament in one minute is 150 C. i.e., option (C) is correct choice.

Answer 2

Answer:

$\huge\underline\bold\red{ANSWER}$

Your answer is opt. no.[c] 150c