Physics 10 Chapter 15 - Electromagnetism - 8

Physics 10 Chapter 15 - Electromagnetism - 8

1. Who found that he could induce electric current by moving a wire through a magnetic field?

a) Michael Faraday
b) Pascal
c) Newton
d) Archimedes

2. Who showed that a changing magnetic field could produce electric current?

a) Pascal
b) Joseph Henry
c) Archimedes
d) Newton

3. What is the number of magnetic lines of force passing through any surface called?

a) Temporary magnet
b) The strength of magnetic field
c) Electromagnetism
d) Magnetism

4. When the surface is held perpendicular to the magnetic lines of force...............................?

a) The number of lines of force is minimum
b) The number of lines of force have no effect
c) The number of lines of force are not produced
d) The number of lines of force is maximum

5. When the surface is held parallel to the magnetic lines of force...............................?

a) The number of lines of force are not produced
b) The number of lines of force is maximum
c) The number of lines of force is minimum
d) The number of lines of force have no effect

6. What does the change in the number of magnetic lines of force through a coil produce?

a) Power
b) E.m.f
c) Current
d) Potential difference

7. What is galvanometer?

a) Potential difference measuring instrument
b) Voltage measuring instrument
c) Resistance measuring instrument
d) Current measuring instrument

8. Who found that to generate current, either the conductor must move through a magnetic field or a magnetic field must change across the conductor?

a) Pascal
b) Archimedes
c) Michael Faraday
d) Newton

9. What is the process of generating an induced current in a circuit by changing the number of magnetic lines of force passing through it called?

a) Conduction
b) Electromagnetism
c) Electromagnetic induction
d) Electronics

10. Faraday was .................. chemist?

a) American
b) French
c) British
d) German

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