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Q1. | For a purely inductive circuit which of the following is true ? |

A. | Apparent power is zero [Wrong Answer] |

B. | Relative power is zero [Wrong Answer] |

C. | Actual power of the circuit is zero [Correct Answer] |

D. | Any capacitance even if present in the circuit will not be charged [Wrong Answer] |

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Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

5 mH

10 mH

5 H

10 H

⇒ The property of coil by which a counter e.m.f. is induced in it when the current through the coil chatiges is known as

self-inductance

mutual inductance

series aiding inductace

capacitance

⇒ The law that the induced e.m.f. and current always oppose the cause producing them is due to

Faraday

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Newton

Coulomb

⇒ As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

lies perpendicular to the magnetic flux

lies in a magnetic field

cuts magnetic flux

moves parallel to the direction of the magnetic field

⇒ Which of the following inductor will have the least eddy current losses?

Air core

Laminated iron core

Iron core

Powdered iron core

⇒ An e.m.f. of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

64 A/s

32 A/s

16 A/s

4 A/s

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hysteresis losses

eddy current losses

both (a) and (b)

none of the above

⇒ Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla.

100 N

400 N

600 N

1000 N

⇒ Lenz's law is a consecluence of the law of conservation of

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charge

enery

induced e.m.f.

⇒ Which circuit element(s) will oppose the change in circuit current?

Resistance only

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⇒ A laminated iron core has reduced eddy-current losses because

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the laminations are insulated from each other

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the laminations are stacked vertically

⇒ A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

0.01 s

0.1 s

0.5 s

5 s

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4 mH

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⇒ Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

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⇒ Two coils have inductances of 8 mH and 18 mH and a co-efficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

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⇒ A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

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⇒ Which of the following is unit of inductance?

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Henry

Ampere turns

Webers/metre

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Henry

Coulomb/volt ampere

Volt second per ampere

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⇒ A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is

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500 ohms

1000 ohms

5000 ohms

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change of number of turns of coil

the resistance of magnetic path

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produce current opposite to the increasing current

aid tite applied voltage

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120 N

240 N

480 N

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quadrupled

⇒ Which of the following circuit element stores energy in the electromagnetic field?

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Condenser

Variable resistor

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⇒ In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

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remain the same

initially increase and then decrease

⇒ Mutually inductance between two magnetically-coupled coils depends on

permeability of the core

the number of their turns

cross-sectional area of their common core

all of the above

⇒ An averaVoltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is

20 Wb

2 Wb

0.2 Wb

0.02 Wb

⇒ The inductance df a coil will increase under all the following conditions except

when more length for the same number of turns is provided

when the number of turns of the coil increase

when more area for each turn is provided

when permeability of the core increases