Basic Electrical Engineering MCQ_47 (Electromagnetism)

    

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

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