The amount of electrical energy consumed. When using 1 kW of power for 1 hour in a circuit. Show it in joules.
A. 4.6 × 106 joule
B. 3.6 × 106 joule
C. 6.3 × 105 joule
D. 6.3 × 106 joule
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The induced current is highest when the direction of motion of the coil is . . . . . . . . relative to the magnetic field ?
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In the circuit given below, what is the current flowing in 6Ω resistances?
A. 0.22
B. 0.55 A
C. 2.22 A
D. 2.775 A
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Which of the following components store energy in the form of electrical charges?
A. Capacitors
B. Transformers
C. Resistors
D. Inductors
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Where are electrical switches are connected?
A. Live wire
B. Ground wire
C. Neutral wire
D. All of these
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The fuse in our domestic electric circuit melts, when there is a high rise in
A. inductance
B. current
C. resistance
D. capacitance
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If an iron on which 1,000 W is inscribed it run for 3 hours daily, then the total energy consumed by it in 30 days will be in kWh-
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What is the statement of Coulomb's law?
A. The magnitude of the force of attraction (or repulsion) between two point charges is inversely proportional to the product of the magnitude of the two charges as well as the square of the distance between them
B. The magnitude of the force of attraction (or repulsion) between two point charges is inversely proportional to the product of the two charges and is inversely proportional to the square of the distance between them
C. The magnitude of the force of attraction (or repulsion) between two point charges is directly proportional to the product of the magnitude of two charges and inversely proportional to the square of the distance between them
D. The magnitude of the force of attraction (or repulsion) between two point charges is directly proportional to the amount of the two charges, as well as the square of the distance between them
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Three resistors 5 Ω, 6 Ω, 4 Ω are connected in series. The total resistance will be . . . . . . . .
A. 10 Ω
B. 15 Ω
C. 10 Ω-m
D. 15 Ω-m
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At which place earth's magnetic field becomes horizontal?
A. Magnetic meridian
B. Magnetic equator
C. Geographical pole
D. Tropic of cancer
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Battery capacity is expressed in . . . . . . . .
A. Ampere-hour
B. Voltage
C. Battery load
D. Volume of electrolyte
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Mutual inductance of few coils can be increased by
A. decreasing the number of turns in the coil
B. increasing the number of turns in the coils
C. winding the coils on wooden core
D. None of the above
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mho' is the unit of . . . . . . . . of a substance.
A. resistance
B. resistivity
C. conductance
D. conductivity
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Which of the following is a vector quantity?
A. Electric charge
B. Electric flux
C. Electric field
D. Electric current
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Which of the following is not a basic component of a transformer:
A. Core
B. Primary coil
C. Secondary coil
D. Mutual flux
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A wire with black insulation during electric supply is
A. Live wire
B. Earth wire
C. Neutral wire
D. Fuse wire
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How much work is done in moving a charge of 2C across two points having a potential difference 10 V?
A. 20 Pa
B. 20 J
C. 20 N
D. 20 C
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Ohm's law describes the relation between . . . . . . . . and . . . . . . . .
A. Electric current, electric charge
B. Electric charge, time
C. Potential, electric current
D. Potential, electric charge
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Nickel-Cadmium (Ni-Cd) battery is used in
A. Calculator
B. Cordless electronic appliances
C. Transistors
D. All of the above
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A given conductor carrying a current of 1 ampere. It produces an amount of heat equal to 2000 J. If the current through the conductor is doubled, then the amount of heat produced will be
A. 2000 J
B. 4000 J
C. 8000 J
D. 1000 J
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