12th class Physics chapter 15 online mcq test with answers for ICS part 2 Physics Chapter 15 (Electromagnetic Induction)

Physics ICS Part 2 Chapter 15 Online MCQ's Test

Sr. #	Questions	Answers Choice
1	When a motor is over loaded then the magnitude of back emf.	Increases Decreases Remain constant Zero
2	Output of D.C. motor is	A.C. energy Mechanical energy Chemical energy D.C. energy
3	The jerks in D.C. motor are created by the use of.	Armature Commutators Split rings Source of emf
4	split rings are used in	A.C. generator A.C. motor Transformer D.C. motor
5	The winding of the electromagnet in motor are usually called.	Magnetic coils Field coils Electric coils electric o electric coils
6	Which of the following converts electrical energy into mechanical energy.	Transformer A.C. generator D.C. generator D.C. motor
7	The device in the circuit that consume electrical energy are known as.	Dissipaters Generator Load Motors
8	If the coil is wound on iron core, the flux through it.	Decreases Becomes zero Increases Remains constant
9	The only difference between the construction of D.C and A.C is.	Carbon burshes Coil Commutator Magnetic field
10	A simple device that prevents the direction of current from changing is called.	Commutator Rotor Armature Detector
11	In D.C. generator, split rings act as.	Capacitor Commutator Resistor Inductor
12	Commentator was invented by	Henry Ousted Maxwell William sturgeon
13	In A.C. generator , when plane of coil is perpendicular to magnetic field, then output of generator is.	NwAB 2pi f Maximum Zero
14	In A.C. inductor behaves as	Capacitor Resistor Commutator Transistor
15	Induced emf in A.C. generator can be increased by	Decreasing area of coil Decreasing magnetic field Increasing area of coil Slowing down speed of coil
16	If speed of rotation of a generator is doubled the output voltage will be.	Remain same Double Four time One half
17	Which one is not present in A.C. generator.	Armature Magnet Slip rings Commutator

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