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MDCAT Physics Chapter 9 Electromagnetic Induction Online Test
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Total Questions20
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Time Allowed20
MDCAT Physics Chapter 9 Electromagnetic Induction Online Test
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Question # 1
Lenz law is in accordance with the law of conservation of:
Question # 2
Transformer obeys the law of conservation of:
Question # 3
A low-loss transformer has 230V applied to the primary and gives 4.6V in the secondary. Secondary is connected to a load which draws 5A of current. The current in the primary is:
Question # 4
When no power is drawn in the secondary coil of an ideal transformer, the power of the primary coil of an ideal transformer, is:
Question # 5
Such a value A.C current which produces the same heating effect as is produced by the D.C of equal magnitude is called:
Question # 6
The motional of emf depends upon the:
Question # 7
In the step up transformer, when the alternating voltage increase then the alternating current will
Question # 8
In general, in an ac circuit:
Question # 9
The loss of power in transformer occurs due to:
Question # 10
Whenever the magnetic flux linked with a coil changes, there is produced an induced e.m.f. in the circuit. This e.m.f. lasts:
Question # 11
In a transformer, the number of primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is:
Question # 12
The induced current can be increased by:
Question # 13
Which one of the following does not effect the magnitude of the induce emf inelectromagnetic induction?
Question # 14
Why does a transformer have a core made of iron
Question # 15
During each cycle, alternating voltage reaches a peak value:
Question # 16
The number of turns in the primary and secondary coils of a transformer are 100 and 300 respectively. If the input power is 60 W then the output power is:
Question # 17
The average value of A.C. current and voltage over a complete cycle is:
Question # 18
The magnitude of emf of a conductor of length L and velocity V is equal to:
Question # 19
An aero plane with a wing span of 50m flies at 540km/hr. The component of the earth’s magnetic field perpendicular to the velocity of the plane is 0.2 x 10-4 Wbm-2 . The potential difference between the tips of the wings is:
Question # 20
The induction e.m.f primarily produced at the cost of:
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