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Electro-Magnetism · ICSE STD 10 (ICSE - English Medium). 12 questions.

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12 questions · timed · auto-graded

Question 11 Mark
Complete the following sentence:
The current induced in a closed circuit only if there is ……………..
Answer
The current induced in a closed circuit only if there is change in number of magnetic field lines linked with the circuit.
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Question 21 Mark

Complete the following sentence :

In a transformer, the frequency of A.C. voltage ________.

Answer
In a transformer, the frequency of A.C. voltage remain same.
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Question 31 Mark
Complete the following sentence :

The transformer is used in ……………. current circuits.

Answer
The transformer is used in alternating current circuits.
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Question 41 Mark
Complete the following sentence :

A current carrying solenoid when freely suspended, it always rests in ………. Direction .

Answer
A current carrying solenoid when freely suspended, it always rest in north-south direction.
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Question 51 Mark
Complete the following sentence :

A current carrying solenoid behaves like a ……………

Answer
A current carrying solenoid behaves like a bar magnet .
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Question 61 Mark
Complete the following sentence :

On reserving the direction of current in a wire, the magnetic field produced by it gets _____.

Answer
On reserving the direction of current in a wire, the magnetic field produced by it gets reversed.
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Question 71 Mark
Complete the following sentence :
when current flows in a wire, it creates ………..
Answer
When current flows in a wire, it creates magnetic field.
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Question 81 Mark
When the ___________ [south/north/west] pole of magnet enters a coil the current induced is in clockwise direction.
Answer
south
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Question 91 Mark
A _________ [motor/generator/convertor] is used in a fan where electrical energy converted to mechanical kinetic rotational energy.
Answer
motor
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Question 101 Mark
Dynamo is an example of conversion of mechanical kinetic rotational energy to ___________  [sound energy/ heat energy/ electrical energy].
Answer
electrical energy
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Question 111 Mark
Transformer works on the principle of ___________  [mutual induction/ self-induction/ Joule's law of heating].
Answer
mutual induction
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Question 121 Mark
Electromagnetic induction is induction of___________ [electric field/magnetic field] due to the presence of external ___________ [magnetic field/electric field].
Answer
magnetic field, electric field
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