Bar Magnet(equivalent solenoid, magnetic field lines,... ) NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Bar Magnet(equivalent solenoid, magnetic field lines,... ) MCQ Questions


1.
A bar magnet is equivalent to:
A.
An electric dipole
B.
A solenoid
C.
A capacitor
D.
A resistor
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ANSWER :
B. A solenoid
2.
The effect of increasing temperature on a ferromagnetic material is

NEET - 2020

A.
It becomes more magnetic
B.
It loses magnetism completely
C.
It shows paramagnetic behavior
D.
It starts behaving like a solenoid
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ANSWER :
B. It loses magnetism completely
3.
The magnetic field lines of a bar magnet:
A.
Are closed loops
B.
Start from north and end at south
C.
Never intersect
D.
Are straight lines
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ANSWER :
A. Are closed loops
4.
The strength of a bar magnet is maximum at:
A.
At the center
B.
At the poles
C.
At random points
D.
Equal everywhere
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ANSWER :
B. At the poles
5.
The torque on a magnetic dipole in a uniform magnetic field is maximum when

NEET - 2018

A.
The dipole is parallel to the field
B.
The dipole is perpendicular to the field
C.
The dipole is anti-parallel to the field
D.
No torque acts in a uniform field
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ANSWER :
B. The dipole is perpendicular to the field
6.
The magnetic field due to a bar magnet along its axial line varies as:
A.
1/r³
B.
1/r²
C.
1/r
D.
Constant
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ANSWER :
A. 1/r³