Electromagnetism Physics Test 03

Total Questions: 21

1 - Which rule shows the direction of lines of forces?

A ) Right hand rule
B ) Left hand rule
C ) Fleming's rule ✅
D ) Joule's law

2 - The simple coil in DC motor, in a magnet rotate more than:

A ) 180°
B ) 90° ✅
C ) 360°
D ) 270°

3 - The rotating coil of electric mother is called:

A ) Solenoid
B ) Shaft
C ) Armature ✅
D ) Axle

5 - Which is used to control our current with the help of small current?

A ) Relay ✅
B ) Resistance
C ) Capacitance
D ) Circuit

6 - A generator is a resembles to which of these if its input and output reversed.

A ) Transformer
B ) Capacitor
C ) Motor ✅
D ) Solenoid

7 - If the current is flowing from top towards the bottom, then the direction of lines of force would be:

A ) Anti-clock wise
B ) Clockwise ✅
C ) Left to right
D ) Along the conductor

8 - Which statement is true for step up transformer?

A ) Is < 1p
B ) Vs > Vp ✅
C ) Vs < Vp
D ) Np > Ns

9 - Which statement is true for step down transformer?

A ) 1p < 1s
B ) Vs > Vp
C ) Vs < Vp ✅
D ) Ns > Np

10 - Faraday was physicist.

A ) British ✅
B ) American
C ) German
D ) French

12 - What is the working of split rings in DC motor?

A ) To convert AC to DC
B ) To convert DC to AC
C ) Maintain current
D ) To reverse the direction of current ✅

14 - The current carrying coil is itself a:

A ) Resistance
B ) Magnet ✅
C ) Diode
D ) Capacitor

15 - Leno's law is the manifestation of the:

A ) Law of conservation of energy ✅
B ) Law of conservation of momentum
C ) Law of conservation of mass
D ) Law of conservation of power

16 - Metal detectors detect metal weapons using the principle of:

A ) Electromagnetic Induction ✅
B ) Self induction
C ) Mutual induction
D ) Electrolysis

17 - Which does play an important role in power distribution:

A ) Capacitor
B ) Transformer ✅
C ) Generator
D ) DC Motor

18 - For an ideal transformer we can write:

A ) Pp = Ps ✅
B ) Pp > Ps
C ) Pp < Ps
D ) Pp = 0

19 - Equation for an ideal transformer:

A ) Vs1p = Vp1s
B ) Vp1p = Vs1s ✅
C ) Vp1p > Vs1s
D ) Vp1p < Vs1s

20 - Transformer is used to change the value of:

A ) Voltage ✅
B ) Power
C ) Energy
D ) Charge

21 - The example of mutual induction is:

A ) DC motor
B ) Transformer ✅
C ) Relay
D ) A.C Generator