Question

A current of 2 A is flowing through a wire for 10 seconds. The number of charges crossing the wire is *

Answer 1

Answer:

Explanation:

Q=it    

Q=? ,i= 2A , t= 10 seconds

Q = 2×10 =20 coulombs.

Answer 2

Electric Current

• The flow of electric charges in a conductor is called electric current.

• Unit of electric charge is coulomb or C, unit of electric current is ampere or A.

Given:

• Current strength, I = 2 ampere

• Time of flow, t = 10 seconds

To find: The number of electric charges (Q) crossing the wire in 10 seconds.

Solution: We know the formula,

• I = Q / t
• or, Q = I × t
• or, Q = 2 × 10
• or, Q = 20

Answer: Therefore 20 coulomb electric charges cross the wire in 10 seconds.