Q. 1 According to first law of magnetism like poles ____ each other and unlike pole _____ each other.
A. attract, attract
B. repel, repel
C. repel, attract
D. attract, repel
Ans.: C
Q. 2 second law of magnetism is also called as__.
A. faraday’s law
B. coulomb’s law
C. lens’s law
D. polarization
Ans.: B
Q. 3 The coulomb’s law states that the force exerted by one pole n the other pole is ______to the product of the pole strength of the two pole and ______ to the square of the distance between them.
A. directly proportional, directly proportional
B. inversely proportional, directly proportional
C. inversely proportional, inversely proportional
D. directly proportional, inversely proportional
Ans.: D
Q. 4 Which of the following is correct?
A. F = K m1/ d2
B. F = K m1 m2 / d3
C. F = k m1m2 / d2
D. F = k m1 m2 d2
Ans.: C
Q. 5 In the right hand gripping rule, the curled finger indicates__.
A. direction of current flowing through the conductor
B. direction of magnetic field produced
C. direction of current flowing into the plane of paper
D. none of the above
Ans.: B
Q. 6 The ____ states that the polarity of magnetic field can be determined by looking at solenoid from any one end and by noting the direction of current flow.
A. End rule
B. right hand rule
C. corkscrew rule
D. faraday’s law
Ans.: A
Q. 7 If a ______ is placed in the magnetic field then it experiences a force as a result of the interaction between their individual magnetic field.
A. conductor
B. piece of magnet
C. current carrying conductor
D. any of the above
Ans.: C
Q. 8 The direction of force experienced by a current carrying conductor placed in a magnetic field is given by ____.
A. Fleming’s right hand rule
B. Fleming’s left hand rule
C. lens’s law
D. end rule
Ans.: B
Q. 9 The magnitude of the force experienced by the current carrying conductor placed in the magnetic field is given by__.
A. F = BINewton
B. F = Bl Newton
C. F = BILNewton
D. F = IlNewton
Ans.: C
Q. 10 The magnitude of the force experienced by the current carrying conductor placed in the magnetic field is depend on
A. the original flux density
B. current flowing through the conductor
C. length of conductor
D. all of the above
Ans.: D
Q. 11 Absolute permeability (µ) of the material is defined as the ratio of ____.
A. magnetic flux density in a particular medium to the magnetic field strength
B. the magnetic field strength to the magnetic flux density in a particular medium
C. Both A and B
D. None of the above
Ans.: A
Q.12 Absolute permeability (µ) is measured in___.
A. meter per Henry
B. Henry per meter
C. Henry
D. any of the above
Ans.: B
Q. 13 The value of permeability of free space µ0 is__.
A. 4∏ x 10-7H/m
B. 4∏ x 10-9H/m
C. 4∏ x 10-12 H/m
D. 4∏ x 10-8H/m
Ans.: A
Q. 14 The relative permeability µris defined as the ratio of ____.
A. flux density in air or vacuum to flux density in a medium
B. flux density in a medium to medium
C. flux density in a medium to flux density in air or vacuum
D. any of the above
Ans.: C
Q. 15 The value of µ0 is ________ but the value of µ _____.
A. always constant, always constant
B. need not constant, always constant
C. always constant, need not always remains constant
D. none of the above
Ans.: C