| 1 |
Which device has two coils, primary and secondary? |
D.C. Motor
Transformer
A.C. genrator
a and b
|
| 2 |
Which type of energy is converted into mechanical energy in the D.C. Motor. |
Magnetic energy
Heat energy
Electrical energy
Chemical energy
|
| 3 |
When did Michael Faraday discover Electromagnetic induction? |
1841
1831
1821
1811
|
| 4 |
Who discovered Electromagnetic induction? |
Michael Faraday
Flemiing
Ohm
Coulomb
|
| 5 |
In D.C.motor split rings are made of: |
Steel
Carbon
Copper
Iron
|
| 6 |
The force on a current carrying conductor is maximum if angle between field and conductor is: |
0<sup>o</sup>
90<sup>o</sup>
180<sup>o</sup>
45<sup>o</sup>
|
| 7 |
According to Fleming's left hand rule the direction of force on the conductor is given by: |
Thumb
Fore finger
Middle finger
None of these
|
| 8 |
According to Fleming's left hand rule the direction of magnetic field is indicated by: |
Thumb
Forefinger
Middle finger
Right hand rule
|
| 9 |
A current carrying conductor produces a field around it is called: |
Electric field
Magnetic field
Both a and b
None of these
|
| 10 |
The magnetic field of a solenoid resembles as: |
Iron wire
U-shape magnet
Bar magnet
Point charge.
|
| 11 |
The end of solenoid from which lines of force emerge out is called: |
North pole
South pole
North and south pole
None of these
|
| 12 |
The lines will be in the form of concentric circles, if conductor is: |
Circular
Straight
Solenoid
None of these
|
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