When the main switch of the house is put OFF, it disconnects the
A. live wire only
B. live wire and the Earth wire
C. live wire and the neutral wire
D. earth wire and the neutral wire
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A photostate machine works on
A. electromagnetic image making
B. electrostatic image making
C. magnetic image making
D. thermal image making
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The flow of . . . . . . . . is anti-clockwise in the given circuit.
A. resistance
B. voltage
C. electrons
D. current
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The instrument used for detecting the presence of electric current in a circuit is
A. refractometer
B. Galvanometer
C. Viscometer
D. Diffractometer
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The energy used in industries and commercial establishments is usually represented in the form of . . . . . . . .?
A. kilowatt-hour
B. watt
C. joule
D. power
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The potential difference is 12 V and the work done is 60J. Find the electric charge flowing through the circuit:
A. 5 C
B. 0.5 C
C. 500 C
D. 50 C
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How much work is done in moving a charge of 5Q across two points having a Potential difference of 10V?
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How does the white light produce in the tube?
A. To heat up the copper wire
B. To heat up the filament
C. To accelerate the atoms
D. To oscillate molecule
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If the amount of work is done in moving the charge of 3 coulombs across two points is 72 J. Then what would be the potential difference across these points?
A. 24 V
B. 216 V
C. 240 V
D. 2.4 V
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What is the process of transferring of charge from a charged object to the Earth called?
A. Discharging
B. Earthing
C. Interaction
D. Lightning
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What would be the resistance of such a wire in which a 2V potential is applied; the current flowing through the wire is 1 A?
A. 0.5 ohm
B. 2 ohm
C. 20 ohm
D. 0.02 ohm
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Which direction does the freely suspended magnet indicate?
A. East-West
B. North-South
C. East-north
D. West-south
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Why is tungsten used in electric bulbs?
A. It has a low melting point
B. It has a high melting point
C. It has high vapor pressure
D. It is resonant or sonorous
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Electric motors operating at low voltages tend to burn out because
A. They draw more current which is inversely proportional to the voltage
B. They draw more current which is inversely proportional to the square root of the voltage
C. They draw heat proportional to v2
D. Low voltage sets in electrical discharge
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By which electric current in a circuit is possible?
A. neutron speed
B. positron speed
C. motion of protons
D. motion of electrons
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In medicine, . . . . . . . . is a device such as small metal plate or needle that carries electricity from an instrument to a patient for treatment or surgery
A. an electrode
B. a machmeter
C. an electrolyte
D. a venturimeter
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Identify the correct statement in related to ampere.
A. One ampere is constituted by the flow of one coulomb of change per minute
B. One ampere is constituted by the flow of two coulomb of change per second
C. One ampere is constituted by the flow of one coulomb of change per second
D. One ampere is constituted by the flow of half coulomb of change per second
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Electric field strength of charge-
A. increases with distance
B. decreases with cube of distance
C. decreases with distance
D. decreases with square of distance
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Which of the following is not an insulator?
A. Paper
B. Nichrome
C. Diamond
D. Ebonite
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Self inductance of a Solenoid is
A. directly proportional to current flowing through the coil
B. directly proportional to its length
C. directly proportional to area of cross section
D. inversely proportional to area of cross-section
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