12th Class Physics Magnetism Question Bank Case Based (MCQs) - Moving Charges and Magnetism

  • question_answer
                                        
    Direction: Q.46 to Q.50
    Moving coil galvanometer operates on Permanent Magnet Moving Coil (PMMC) mechanism and was designed by the scientist D'arsonval.
    Moving coil galvanometers are of two types:
    (i) Suspended coil               
    (ii) Pivoted coil type or tangent galvanometer.                
    Its working is based on the fact that when a current carrying coil is placed in a magnetic     field, it experiences a torque. This torque tends to rotate the coil about its axis of suspension in such a way that the magnetic flux passing through the coil is maximum.
    Read the given passage carefully and give the answer of the following questions.
    A moving coil galvanometer is an instrument which:

    A) is used to measure emf

    B)             is used to measure potential difference

    C)             is used to measure resistance

    D)             is a deflection instrument which gives a deflection when a current flows through its coil

    Correct Answer: D

    Solution :

    (d) is a deflection instrument which gives a deflection when a current flows through its coil A moving coil galvanometer is a sensitive instrument which is used to measure a deflection when a current flows through its coil.


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