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Chapter:

Electromagnetism and Magnetic Field Solved MCQs

in A Level Physics

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .

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Chapter: Electromagnetism and Magnetic Field
1.

Strength of magnetic field is known as

A. flux
B. density
C. magnetic strength
D. magnetic flux density
Answer» D. magnetic flux density
discuss
2.

Unit of luminous intensity is

A. m
B. kg
C. cd
D. mol
Answer» C. cd
discuss
3.

For a hydrogen atom the electrical force as compared to gravitational force is{{}}

A. 1039 times
B. 10 40 times
C. 10 41 times
D. 10 42 times
Answer» A. 1039 times
discuss
4.

Weakest force in nature is

A. electric force
B. gravitational force
C. weak force
D. magnetic force
Answer» B. gravitational force
discuss
5.

Magnetic field can be produced by using

A. permanent magnet
B. electric current
C. temporary magnet
D. both A and B
Answer» D. both A and B
discuss
6.

Whenever there is force on magnetic pole, there exists

A. magnetic field
B. electric field
C. current
D. voltage
Answer» A. magnetic field
discuss
7.

If the magnetic flux density and current are at right angles, then component of force acting on the conductor is

A. BIL cosθ
B. BIL sinθ
C. BIL tanθ
D. BL sinθ
Answer» B. BIL sinθ
discuss
8.

Unraveling an electromagnetic gives

A. stronger field
B. weaker field
C. moderate field
D. wider field
Answer» B. weaker field
discuss
9.

Force per meter on two wires carrying a current of 1 A placed 1 m apart is equal to {{}}

A. 6.7 × 10 -11 N
B. 9.0 × 10 9 N
C. 2.0 × 10 -7 N
D. 3.0 × 10 -4 N
Answer» C. 2.0 × 10 -7 N
discuss
10.

F = BIL can only be used if the magnetic field and electric current are

A. at right angles to each other
B. in same direction
C. anti-parallel to each other
D. anti-perpendicular to each other
Answer» A. at right angles to each other
discuss
11.

Derived unit Tesla is related to

A. A
B. kg
C. s
D. all of above
Answer» D. all of above
discuss
12.

If we reverse the direction of electric current, then the direction of magnetic field will be

A. reversed
B. remains same
C. becomes tangent
D. becomes normal
Answer» A. reversed
discuss
13.

1 Tesla is equal to {{}}

A. 50 N A-1 m-1
B. 100 N A-1 m-1
C. 1 N A-1 m-1
D. 1000 N A-1 m-1
Answer» C. 1 N A-1 m-1
discuss
14.

Field which does not have magnetic poles is

A. straight lined
B. normal to the wire
C. tangent to the wire
D. circular
Answer» D. circular
discuss
15.

A flat coil and solenoid has

A. different fields
B. same physical properties
C. same fields
D. same chemical properties
Answer» C. same fields
discuss
16.

Flux density is defined by {{}}

A. FIL
B. F⁄(IL
C. IL
D. I⁄(FL
Answer» B. F⁄(IL
discuss
17.

Strength of magnetic field of solenoid can be increased by adding core made of

A. copper
B. ferrous
C. silver
D. aluminum
Answer» B. ferrous
discuss
18.

In Fleming's left hand rule, thumb shows direction of

A. current
B. field
C. motion
D. charge
Answer» C. motion
discuss
19.

If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is

A. thrice the Earth's magnetic flux density
B. four times the Earth's magnetic flux density
C. five times the Earth's magnetic flux density
D. twice the Earth's magnetic flux density
Answer» D. twice the Earth's magnetic flux density
discuss

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