Ampere’s Law and its Applications to Infinitely Long Current Carrying Straight Wire and Solenoid NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Ampere’s Law and its Applications to Infinitely Long Current Carrying Straight Wire and Solenoid MCQ Questions


13.
The magnetic field inside a toroid of mean radius r carrying current I with N turns is:
A.
μ₀NI/(4πr)
B.
μ₀NI/r
C.
Zero
D.
μ₀NI/(2πr)
😑 View Answer Rough Work Error
ANSWER :
D. μ₀NI/(2πr)
14.
Which of the following cannot be calculated using Ampere's law easily?
A.
Field inside toroid
B.
Field inside long solenoid
C.
Field around infinite straight wire
D.
Field at centre of a finite circular loop
😑 View Answer Rough Work Error
ANSWER :
D. Field at centre of a finite circular loop
15.
Magnetic field inside a solenoid depends on:
A.
Material of wire used
B.
Number of turns per unit length and current
C.
Radius of solenoid
D.
Length of solenoid only
😑 View Answer Rough Work Error
ANSWER :
B. Number of turns per unit length and current
16.
Force per unit length between two long parallel wires carrying currents I₁ and I₂, separated by distance d is:
A.
μ₀I₁I₂/d
B.
μ₀I₁I₂/(πd²)
C.
μ₀I₁I₂/(2πd)
D.
μ₀I₁I₂/(4πd)
😑 View Answer Rough Work Error
ANSWER :
C. μ₀I₁I₂/(2πd)
17.
The magnetic field B due to a long straight wire at perpendicular distance r varies as:
A.
r
B.
r²
C.
1/r
D.
1/r²
😑 View Answer Rough Work Error
ANSWER :
C. 1/r
18.
A solenoid of length L has N turns. When stretched to length 2L (same N, same I), the magnetic field inside becomes:
A.
Four times
B.
Same
C.
Half
D.
Double
😑 View Answer Rough Work Error
ANSWER :
C. Half