The Force Between Two Parallel Currents Carrying Conductors-Definition of Ampere NEET Questions

Physics - Magnetic Effects of Current and Magnetism

The Force Between Two Parallel Currents Carrying Conductors-Definition of Ampere MCQ Questions


1.
Two long parallel wires carrying currents in the same direction:
A.
Do not exert any force
B.
Repel each other
C.
Attract each other
D.
Rotate about each other
😑 View Answer Rough Work Error
ANSWER :
C. Attract each other
2.
Two long parallel wires carrying currents in opposite directions:
A.
Accelerate each other
B.
Attract each other
C.
Repel each other
D.
Exert no force
😑 View Answer Rough Work Error
ANSWER :
C. Repel each other
3.
The force per unit length between two long parallel wires carrying currents I₁ and I₂ separated by distance d is:
A.
μ₀I₁I₂/(2πd)
B.
μ₀I₁I₂/(4πd)
C.
μ₀I₁I₂/(πd²)
D.
μ₀I₁I₂/d
😑 View Answer Rough Work Error
ANSWER :
A. μ₀I₁I₂/(2πd)
4.
One ampere is that current which flowing in two parallel wires of negligible cross-section placed 1 m apart in vacuum produces a force per unit length of:
A.
2 × 10⁻⁶ N/m
B.
2 × 10⁻⁷ N/m
C.
2 × 10⁻⁵ N/m
D.
10⁻⁷ N/m
😑 View Answer Rough Work Error
ANSWER :
B. 2 × 10⁻⁷ N/m
5.
Two parallel wires each of length 10 cm carry 2 A and 3 A currents in the same direction and are separated by 1 cm. The force between them is:
A.
1.2 × 10⁻⁵ N (attractive)
B.
6 × 10⁻⁶ N (repulsive)
C.
3 × 10⁻⁵ N (attractive)
D.
1.2 × 10⁻⁶ N (attractive)
😑 View Answer Rough Work Error
ANSWER :
A. 1.2 × 10⁻⁵ N (attractive)
6.
When currents in two parallel wires are reversed (both at once), the force between them:
A.
Remains same in magnitude and nature
B.
Reverses direction
C.
Changes from attractive to repulsive
D.
Becomes zero
😑 View Answer Rough Work Error
ANSWER :
A. Remains same in magnitude and nature