Moving Coil Galvanometer(General Knowledge > General Science ) Questions and Answers

Question 1. A linear conductor carrying current if placed parallel to the direction of magnetic field, then it experiences ---------------- force
  1.    Maximum
  2.    Zero
  3.    normal
  4.    None of these
Explanation:-
Answer: Option B. -> Zero
Question 2. What type of current is produced in a battery
  1.    induced
  2.    magnetic
  3.    alternating
  4.    direct
Explanation:-
Answer: Option D. -> direct
Question 3. Moving a permanent magnet through a coil of wire will
  1.    demagnetize the magnet
  2.    the wire will become an electromagnet
  3.    the magnet will become electrified
  4.    a current will be generated in the wire
Explanation:-
Answer: Option D. -> a current will be generated in the wire
Question 4. What type of materials are needed to create an electromagnet?
  1.    battery, light bulb, plastic straw
  2.    battery, coil of wire, iron core
  3.    generator, iron core, switch
  4.    switch, source of electricity, compass
Explanation:-
Answer: Option B. -> battery, coil of wire, iron core
Question 5. Which way will NOT increase the strength of the magnetic field of an electromagent
  1.    increasing the current
  2.    using a stronger ferromagnetic core
  3.    winding the coils closer together
  4.    decreasing the number of loops
Explanation:-
Answer: Option D. -> decreasing the number of loops
Question 6. What makes an electromagnet different than a permanent magnet
  1.    it can be turned on and off
  2.    All of above
  3.    its strength can be increased and decreased
  4.    its polarity can be reversed
Explanation:-
Answer: Option B. -> All of above
Question 7. Electric currents passing through wires will produce a(n)
  1.    solenoid
  2.    magnet
  3.    magnetic field
  4.    insulator
Explanation:-
Answer: Option C. -> magnetic field
Question 8. As earth's magnetic poles move what happens to the magnetic declination of a given location
  1.    it will always remain constant
  2.    it will return to zero
  3.    it will change
  4.    it will always double
Explanation:-
Answer: Option C. -> it will change
Question 9. What is known as the difference between the earth's magnetic pole and its geographic pole?
  1.    magnetic declination
  2.    magnetic difference
  3.    geographic decline
  4.    geographic increase
Explanation:-
Answer: Option A. -> magnetic declination
Question 10. What would happen if I move a bar magnet in and out of a coil of copper wire?
  1.    Electric current would disappear 
  2.    The magnet would explode 
  3.    Electric current will flow through the wire
  4.    It would produce a gravitational field
Explanation:-
Answer: Option C. -> Electric current will flow through the wire
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