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TEST - 38 ( ELECTROMAGNETISM )
EFFORTS NEVER FAIL
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1. Magnetic field induction at a point nearer a straight current carrying conductor depends on
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1 point
Distance
Current
Both
None
2. A current carrying wire produces
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1 point
An electric field
A magnetic field
A and B
Neither electric nor magnetic field
3. Which of the following rule is used in the working of motor?
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1 point
Fleming’s left hand rule
Fleming’s right hand rule
Faraday law of electromagnetic induction
Lenz’s law
4. A device used for producing current is
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1 point
Generator
Volt meter
Ammeter
Galvanometer
5. A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid is
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1 point
No change
Will decrease
Will increase
Uncertain
6. The metallic half rings in a motor are called
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1 point
Carbon brushes
Commutator
Shaft
Galvenometer
7. Magnetic flux() is the product of magnetic field induction(B) and
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1 point
Area
EMF
Current
Potential difference
8. Weber/ (meter)2
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1 point
Gauss
1 Volt/Ampere
Tesla
Joule / Coloumb
9. The current in the wire depends
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1 point
Only on the potential difference applied
Only on the resistance of the wire
On both of them
None of these
10. The SI unit of magnetic field induction is
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1 point
Tesla
Weber
Henry
No units
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