Chapter : Current Electricity
Electric Current - 1
1.
The rate of flow of charge in a circuit is called
(A) Electric Potential
(B) Electric Current
(C) Electric Field
(D) All of these
2.
Which of the following is not a unit of charge :
(A) Coulomb
(B) Ampere-second
(C) Ampere/second
(D) Microcoulomb
3.
Ampere-second stands for the unit of :
(A) power
(B) charge
(C) potential
(D) energy
4.
An electric current of 5A is the same as :
(A) 5 JC –1
(B) 5 VC –1
(C) 5 Cs–1
(D) 5 Js–1
5.
The electric current is expressed in :
(A) Volt
(C) Coulomb/second
(B) Ampere
(D) B & C both are correct
6.
–
If electrons are flowing from A to B then the correct statement is :
A
B
(A) A is at higher potential than B
(B) B is at higher potential than A
(C) Both are at same potential
(D) Can’t say anything
+
7.
A flow of 105 electron per second in a conducting wire constitutes a current of :
(A) 1.6 × 10–24 A
(B) 1.6 × 1024 A
(C) 1.6 × 10–14 A
(D) 1.6 × 1010 A
8.
Current of 4.8 ampere is flowing through a conductor. Then the number of electrons flowing per second
through it will be :
(A) 3 × 1019
(B) 6 × 1021
(C) 6 × 1020
(D) 3 × 1020
9.
If I is the current through a wire and e is the charge of electron, then the number of electrons passing
through it cross section in t seonds will be given by:
10.
Ie
(B) Ite
t
Value of Current i in the following circuit is :
(A)
(C)
1. (B)
2. (C)
3. (B)
It
e
i
6A
(B) 12 A
(D)
1A
10A
(A) 13 A
e
It
2A
(C) 9 A
ANSWER KEY
Physics (Electric Current - 1)
4. (C)
5. (D)
6. (B)
7. (C)
(D) none of the above
8. (A)
9. (D)
10. (A)
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