Q. 1 The relationship between the magnetism and electric current was first discovered by____.
A. Faraday’s
B. Oersted
C. Ohms
D. All of the above
Ans.: B
Q. 2 A conductor carrying a current is always surrounded by a magnetic field along the length of e conductor. This is known as___.
A. electrostatic field
B. magnetic field
C. electromagnetism
D. electric field intensity
Ans.: C
Q. What is electromagnetism?
A. 3 It is a branch of electrical engineering that studies the magnetic effects of magnet.
B. It is a branch of electrical engineering that studies the magnetic effects of an electric current.
C. Both a and B
D. none of the above
Ans.: B
Q. 4 _____is a piece of solid substance which exhibits a property of attraction of small pieces of certain materials.
A. Solid
B. metal
C. magnet
D. all of the above
Ans.: C
Q. 5 which of the following is/are type of magnet?
A. Natural magnet
B. Electromagnet
C. Both A and B
D. None of the above
Ans.: C
Q. 6 Which magnets loses its magnetism as soon as the current passing through them is becomes zero?
A. Natural magnets
B. Electromagnets
C. Both A and B
D. any of the above
Ans.: B
Q. 7 If a magnet is placed near a piece of a magnetic material such as iron, then without any physical contact, magnetism gets transferred to the piece of iron. This phenomenon is called as_____.
A. electromagnetism
B. magnetic effects of an electric current
C. Both A and B
D. magnetic induction
Ans.: D
Q. 8 Whenever dc current passed through a conductors, a magnetic field gets generated is ____.
A. time varying magnetic field
B. steady magnetic field
C. not steady and not time varying
D. Both A and B
Ans.: B
Q. 9 If the current is alternating, then the generated field is____.
A. steady magnetic field
B. time varying magnetic field
C. Both A and B
D. none of the above
Ans.: B
Q. 10 If the current flowing through a conductor is moving away from the observer and into the plane of the paper. The direction of the current is indicated by____.
A. dot convention
B. cross convention
C. right hand rule
D. Both A and B
Ans.: B
Q.11 To determine the direction of magnetic field associated with the current flowing through a conductor, we can use the following rule.
A. the right handed thumb rule and right hand griping rule
B. the corkscrew rule
C. cross convention
D. Both A and B
Ans.: D
Q. 12 If the current flowing through a conductor is moving towards the observer or coming out of the plane of paper. Then the direction of current is indicated by____.
A. dot convention
B. cross convention
C. the corkscrew rule
D. any of the above
Ans.: A
Q. 13 ___ is defined as the ability of a material to carry the flux lines.
A. permeability
B. permittivity
C. reluctance
D. resistance
Ans.: A
Q. 14 If a material allows the flux lines to pass through it easily then the material is said to have a___.
A. low permeability
B. medium permeability
C. high permeability
D. any of the above
Ans.: C
Q. 15 Magnetic field lines are representation of ___.
A. electric filed
B. magnetic flux
C. magnetic field
D. electric flux
Ans.: C