Biot-Savart Law and its Application to Current Carrying Circular Loop NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Biot-Savart Law and its Application to Current Carrying Circular Loop MCQ Questions


7.
Two circular coils of radii in the ratio 1:2 carry the same current. The ratio of magnetic fields at their centres is:
A.
2 : 1
B.
1 : 2
C.
1 : 4
D.
4 : 1
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ANSWER :
A. 2 : 1
8.
The magnetic field on the axis of a circular loop is maximum at:
A.
x = R
B.
x = 2R
C.
x = 0 (centre of loop)
D.
x = R/2
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ANSWER :
C. x = 0 (centre of loop)
9.
The magnetic field at the centre of a circular loop of radius R is B₀. At a distance R on its axis from the centre, the field will be:
A.
B₀ / √2
B.
B₀ / 4
C.
B₀ / (2√2)
D.
B₀ / 2
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ANSWER :
C. B₀ / (2√2)
10.
The magnetic field due to a current element at a point on its own axis (along dl) is:
A.
Infinite
B.
Zero
C.
Maximum
D.
Minimum but non-zero
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ANSWER :
B. Zero
11.
The unit of μ₀/(4π) in SI system is:
A.
Henry/meter
B.
Weber/Ampere
C.
Tesla·meter/Ampere
D.
N/A²
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ANSWER :
C. Tesla·meter/Ampere
12.
Biot-Savart's law is analogous in electrostatics to:
A.
Ohm's law
B.
Gauss's law
C.
Coulomb's law
D.
Ampere's law
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ANSWER :
C. Coulomb's law