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1. The force on a current-carrying conductor in magnetic field was suggested by
A. Oersted
B. Ampere
C. Faraday
D. Maxwell
3. The rule used to determine the direction of force on conductor is
A. Fleming’s right-hand rule
B. Fleming’s left-hand rule
C. Right-hand thumb rule
D. Ampere’s rule
4. In Fleming’s left-hand rule, the thumb represents
A. Current direction
B. Magnetic field direction
C. Motion/force direction
D. Potential difference
5. In Fleming’s left-hand rule, the forefinger shows
A. Direction of current
B. Direction of magnetic field
C. Direction of conductor
D. Direction of electron motion
6. In Fleming’s left-hand rule, the middle finger shows
A. Field direction
B. Force direction
C. Current direction
D. Voltage direction
7. Devices using force on a conductor in a field include
A. Motor and generator
B. Toaster and heater
C. Transformer and fuse
D. Electroscope and voltmeter
8. The direction of current is taken opposite to
A. Electron motion
B. Magnetic field
C. Current in solenoid
D. Field lines
9. The live wire in domestic circuit has insulation of
A. Green
B. Black
C. Red
D. Blue
10. The neutral wire in domestic supply has insulation of
A. Blue
B. Green
C. Black
D. Red
11. The potential difference between live and neutral wires in our country is
A. 110 V
B. 220 V
C. 440 V
D. 50 V
12. The frequency of AC supply in India is
A. 60 Hz
B. 25 Hz
C. 50 Hz
D. 100 Hz
13. The earth wire has insulation of
A. Red
B. Black
C. Green
D. Blue
14. The earth wire is connected to
A. Ceiling
B. Water tank
C. Metal plate deep in earth
D. Transformer
15. The purpose of earth wire is to
A. Supply current
B. Increase voltage
C. Provide safety by preventing shocks
D. Reduce resistance
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