• 1. 
    Most sensitive galvanometer is:

  • Elastic galvanometer
  • Vibration galvanometer
  • Dubble galvanometer
  • Spot ballistic galvanometer
  • 2. 
    For protecting a galvanometer during transport:

  • A capacitor is connected across the terminals
  • Critical damping resistance is connected across the terminals
  • The terminals are kept open circuited
  • The terminals are kept shorted
  • 3. 
    Which description best applies to Lenz's Law?

  • An induced current occurs when a magnet passes through a tube.
  • When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change.
  • The direction of an induced current is such to align with the change that created it.
  • A magnet is a tube is always slowed by its magnetic field.
  • 4. 
    Resistances can be measured with the help of:

  • Wattmeters
  • Voltmeters
  • Ammeters
  • Ohmmeters and resistance bridges
  • All of the above
  • 5. 
    What benefit is gained by the addition of the iron core in an electromagnet?

  • It makes a strong magnet weaker
  • It makes a weak magnet stronger
  • There is no benefit at all
  • It lets currents interact with each other
  • 6. 
    Electromagnetic induction is taking place in this experiment. How much electricity is being produced?

  • -10 Volts
  • 10 Volts
  • 100 Volts
  • This question cannot be answered based on this image
  • 7. 
    Which activity will produce the highest current?

  • Move the magnet bar into the coil while the coil remains stationery
  • Move the coil into the magnet bar while the magnet remains stationery
  • Move the coil and magnet towards each other
  • Move the coil and magnet away from each other
  • 8. 
    ___ Law says that the Induced current is proportional to the change of magnetic flux

  • Lenz'
  • Faraday's
  • Ampere's
  • 9. 
    Voltage can be induced in a wire by

  • a. moving the wire near a magnet.
  • b. moving a magnet near the wire.
  • c. changing the current in a nearby wire.
  • d. all of these
  • 10. 
    A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage

  • quadruples
  • doubles
  • is the same
  • halves
  • 11. 
    Electromagnetic induction is change in ___________________.

  • surface area
  • magnetic poles
  • magnetic flux
  • 12. 
    Damping of the Ballistic galvanometer is made small to:

  • Make the system critically damped
  • Get minimum overshoot
  • Get first deflection large
  • Make the system oscillatory
  • 13. 
    How could the experimenter increase the amount of electricity being induced by this experiment?

  • Increase the number of coils
  • Decrease the number of coils
  • Flip the magnet around
  • Nothing, the amount of electricity cannot be increased
  • 14. 
    Which action will increase the deflection of the galvanometer pointer?

  • The magnetic pole is reversed
  • The number of turns of coils is increased
  • The coil is made from insulated wire
  • The magnet is slowly pushed into the coil
  • 15. 
    What would happen if I move a bar magnet in and out of a coil of copper wire?

  • Electric current would disappear
  • The magnet would explode
  • Electric current will flow through the wire
  • It would produce a gravitational field
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