Physics Quiz: Effects Of Electric Current Trivia Questions!

13 Questions | Total Attempts: 2118

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Physics Quiz: Effects Of Electric Current Trivia Questions!


Questions and Answers
  • 1. 
    Joule’s law of heating is (1)        (2)         (3)            (4)
    • A. 

      (3)

    • B. 

      (1)

    • C. 

      (2)

    • D. 

      (4)

  • 2. 
    Nichrome wire is used as the heating element because it has
    • A. 

      High specific resistance

    • B. 

      Low melting point

    • C. 

      Low specific resistance

    • D. 

      High conductivity

  • 3. 
    Peltier coefficient at a junction of a thermocouple depends on
    • A. 

      The temperature of the junction

    • B. 

      The charge that passes through the thermocouple

    • C. 

      The time for which current flows

    • D. 

      The current in the thermocouple

  • 4. 
    In a thermocouple, the temperature of the cold junction is , the neutral temperature is . The temperature of inversion is  
    • A. 

      (1)

    • B. 

      (2)

    • C. 

      (3)

    • D. 

      (4)

  • 5. 
    Which of the following equations represents Biot-savart law? (1)         (2) (3)           (4)
    • A. 

      (4)

    • B. 

      (3)

    • C. 

      (1)

    • D. 

      (2)

  • 6. 
    Magnetic induction due to an infinitely long straight conductor placed in a medium of permeability μ is  
    • A. 

      (4)

    • B. 

      (2)

    • C. 

      (3)

    • D. 

      (1)

  • 7. 
    In a tangent galvanometer, for a constant current, the deflection is . The plane of the coil is rotated through . Now, for the same current, the deflection will be
    • A. 

      (4)

    • B. 

      (2)

    • C. 

      (1)

    • D. 

      (3)

  • 8. 
    The period of revolution of a charged particle inside a cyclotron does not depend on
    • A. 

      The velocity of the particle

    • B. 

      The magnetic induction

    • C. 

      The charge of the particle

    • D. 

      The mass of the particle

  • 9. 
    The torque on a rectangular coil placed in a uniform magnetic field is large, when
    • A. 

      the number of turns is large

    • B. 

      The number of turns is less

    • C. 

      The plane of the coil is perpendicular to the field

    • D. 

      The area of the coil is small

  • 10. 
    Phosphor – bronze wire is used for suspension in a moving coil galvanometer, because it has
    • A. 

      Small couple per unit twist

    • B. 

      High conductivity

    • C. 

      Large couple per unit twist

    • D. 

      High resistivity

  • 11. 
    Of the following devices, which has small resistance?  
    • A. 

      Ammeter of range 0–10 A

    • B. 

      Ammeter of range 0 – 1A

    • C. 

      Voltmeter

    • D. 

      Moving coil galvanometer

  • 12. 
    A galvanometer of resistance G Ω is shunted with S Ω .The effective resistance of the combination is Ra. Then, which of the following statements is true?
    • A. 

      Ra is less than both G and S

    • B. 

      S is less than Ra but greater than G.

    • C. 

      S is less than both G and Ra

    • D. 

      G is less than S

  • 13. 
    An ideal voltmeter has
    • A. 

      infinite resistance

    • B. 

      Zero resistance

    • C. 

      Finite resistance less than G but greater than Zero

    • D. 

      Resistance greater than G but less than infinity