Electromagnetism Physics Test 02

Total Questions: 21

4 - In D.C motor split rings are made of:

A ) Steel
B ) Carbon
C ) Copper ✅
D ) Iron

5 - Who discovered Electromagnetic Induction?

A ) Michael Faraday ✅
B ) Flemming
C ) Ohm
D ) Coulomb

6 - Michael Faraday belonged to.

A ) British ✅
B ) U.S.A
C ) K.S.A
D ) Russia

7 - A device which converts electrical energy into mechanical energy is called:

A ) DC motor ✅
B ) Generator
C ) Transformer
D ) All of these

8 - Which device has to coils, primary and secondary?

A ) D.C Motor
B ) Transformer ✅
C ) A.C. generator
D ) a and b

9 - The voltage is decreased by:

A ) Step-up transformer ✅
B ) Step-down transformer
C ) A.C. generator
D ) D.C Motor

10 - Transformer which increases voltage is called:

A ) Step-up transformer ✅
B ) Step-down transformer
C ) A.C. generator
D ) D.C. Motor

11 - In A.C generator flux will be zero if coil is to the field:

A ) 90
B ) 45⁰
C ) parallel ✅
D ) inclined

12 - If the change of current in a current in a circuit induced a current in another circuit, this phenomena is known as:

A ) Self induction
B ) Mutual induction ✅
C ) Electromagnetic Induction
D ) Non-mutual induction

14 - When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

A ) The same as direction of field
B ) Opposite to the direction of the field
C ) makes an angle of 45° with the current
D ) at right angle to both the field and the current ✅

15 - Bank credit cards have a strips engraved on them:

A ) Electric
B ) Electronic
C ) Magnet ✅
D ) Mechanical

17 - Law of electromagnetic induction and electrolysis were presented by:

A ) Simon Ohm
B ) George Coulomb
C ) Newton
D ) Michael Faraday ✅

18 - A current carrying conductor produces a field around it is called:

A ) Electric field
B ) Magnetic field ✅
C ) Gravitational field
D ) Nuclear field

20 - If current is coming out from the plane surface of paper, we put the sign:

A ) cross (×)
B ) summation (+)
C ) distribution (÷)
D ) dot(.) ✅