Chapter 4: Electromagnetism Physics Mcqs for High School - Grade 10


Q.  The number of coils in a transformer is

a. 2
b. 3
c. 4
d. 5


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The loop in magnetic field rotates due to
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MCQs:  If the coil is placed perpendicular to field lines then the number of lines passing through the coil is
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MCQs:  If a transformer is used to supply voltage to a 15 V model train which draws a current of 0.7 A. If the voltage of the A.C source is 210 V, the current in the primary should be
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MCQs:  If the AC source is 240 V and a transformer supplies 12 V to a model train which draws a current of 0.8 A then primary current is
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MCQs:  The phenomenon of induction of induced current in one coil due to change of current in a neighboring coil is called
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MCQs:  If we increase the number of loops, the turning effect would
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MCQs:  A coil of wire consisting of many loops is known as
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MCQs:  As per Michael Faraday, if the forefinger points the direction of the magnetic field, the middle finger in the direction of the current, then the thumb would indicate the direction of
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MCQs:  If the current in one coil becomes steady then magnetic field lines become
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MCQs:  At the generating station, the AC voltage is
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MCQs:  The type of temporary magnet, which is created when current flows through a coil is called an
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MCQs:  An ideal transformer dissipates by itself
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MCQs:  If we grip the coil with our right hand by curling our fingers in the direction of the conventional current, our thumb will indicate the coil's
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MCQs:  The power is transmitted over long distances at high voltage to minimize the
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MCQs:  Through a conductor, an electric current produces a
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MCQs:  The direction of induced Electromotive force (EMF) in a circuit is under the law of conservation of
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MCQs:  The direction of induced current in a circuit is always such that it opposes the cause that produces it. This law was introduced by
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MCQs:  By reducing the current through the cable, power loss in the form of heat dissipation can be
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MCQs:  A practical application of mutual induction is called
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MCQs:  Transformers are used to
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