Matric Part 2 Physics chapter 15 online mcq test with answers for 10th class chemistry unit 15 (Electromagnetism)

Physics 10th Class English Medium Unit 6 Online Test

Sr. #	Questions	Answers Choice
1	The step-up transformer	Increases the input current Increase the input voltage Has more turns in the primary Has less turns in hte secondary coil
2	The direction of induced e.m.f. in a circuit is in accordance with conservation of.	Mass Charge Momentum Energy
3	Which part of a D.C. motor reverses the direction of current through the coil every half-cycle.	The armature The commutator The burshes The slip rings
4	D.C. motor converts.	Mechanical energy into electrical energy Mechanical energy into chemical energy Electrical energy into mechanical energy Electrical energy into chemical energy
5	If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire.	Increases Decreases Remains the same Will be zero
6	The presence of a magnetic field can be detected by a	small mass Stationary positive charge Stationary negative charge Magnetic compass
7	What is the direction of the magnetic field lines inside a bar magnet?	From north pole to south pole From south pole to north pole From side to side There are no magnetic field lines.
8	Which statement is true about the magnetic poles?	Unlike poles repel Like poles attract Magnetic poles do not effect each other A single magnetic pole does not exist
9	Transformer works on _______ supply.	A.C D.C Battery Both A and B
10	A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be:	0 volt 30 volts 45 volts 60 volts
11	The coil of a transformer which is connected to A.C is called:	Primary coil Secondary coil Field coil Armature coil
12	Which device is used to increases / decreases A.C Voltage?	Electric motor Transformer A.C Generator Solenoid

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