Question

12. A current of 10 A flows in an electric circuit. The
amount of charge that will flow through a point of
circuit in 30 minutes is
(1) 18000 C
(2) 9000 C
(3) 4500 C
(4) 36000 C
​

Answer 1

Given :-

Current = 10A

Time = 30 × 60 seconds

To Find :-

Amount of charge

Solution :-

We know :-

$\bf Q = I \times t$

Here :-

• Q = Amount of charge
• I = Current
• t = time

Substitute the values :-

$: \implies \sf Q = 10 \times 30 \times 60$

$: \implies \sf Q = 18000$

Amount of charge = 18000 C

Correct option is (1)

Answer 2

Answer:

Given :-

• A current of 10 A flows in an electric circuit. It will flow through a point of circuit in 30 minutes.

To Find :-

• What is the amount of charge.

Formula Used :-

$\clubsuit$ Charge Formula :

$\longmapsto \sf\boxed{\bold{\pink{Q =\: I \times t}}}$

where,

• Q = Charge
• I = Current
• t = Time

Solution :-

First, we have to change the time into seconds :

$\implies \sf Time =\: 30\: minutes$

$\implies \sf Time =\: 30 \times 60\: seconds\: \bigg\lgroup \bold{\purple{1\: minutes =\: 60\: second}}\bigg \rgroup$

$\implies \sf \bold{\green{Time =\: 1800\: seconds}}$

Now, we have to find the amount of charge :

Given :

• Current = 10 A
• Time = 1800 seconds

According to the question by using the formula we get,

$\dashrightarrow \sf Charge =\: 10\: \times 1800$

$\dashrightarrow \sf\bold{\red{Charge =\: 18000\: C}}$

$\therefore$ The amount of charge is 18000 Coulomb .

Hence, the correct options is option no (1) 18000 C .