Question

21. A steady current of 0.4 mA flows through
a wire how much charge passes through
the wire in one minute ?
U
1) 0.24c 2) 2.4c 3) 24c 4)0.024
​

Answer 1

I=0.4 mA

t=1 min = 60sec

Since we know that

I=Q/t

Q=I.t

Q=0.4 * 60

Q=24 mC

Or.

Q=0.024 C is the correct answer

Hope it helps you

Please mark as brainleist

☺️☺️☺️

Answer 2

Answer:

0.024 Coulomb of charge flows through wire if a steady current of 0.4 mA flows for one minute.

Explanation:

• Electric current is movement of charges particles along any conductor .
• It is a measure of rate of flow of charge in any conductor with respect to time.
• Mathematically, current is defined as :

$i = \frac{charge \: flowing \: through \: conductor}{time} \\ = \frac{q}{t}$

• S.I unit of current is Ampere, denoted by A .
• S.I. unit of charge is Coulomb, denoted by C .
• 1 Coulomb of charge = 6.25 x 10¹⁸ electrons.

Given that:

• A steady current of 0.4 mA flows through a wire.

To find :

• Charge passing through wire in one minute .

Solution :

• Current flowing through wire, i = 0.4 mA
• Charge passing through wire in one minute is given by:

$i = \frac{q}{t} \\ q = i\times t \\ q = 0.0004 \times 60 \\ = 0.024 \: coulomb$

• Hence, 0.024 Coulomb of charge flow through the wire in one minute.