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MCQs 1: In half wave rectifiers, diode conducts during

Only positive half cycle Only negative half cycle Both positive and negative half cycle Neither in positive half cycle nor in negative half cycle
Answer Explanation

MCQs 2: Specific resistance of a material is

Directly proportional to the both area of cross section and length of material Directly proportional to the area of cross section and inversely proportional to the length of material Inversely proportional to the area of cross section and directly proportional to the length of material Inversely proportional to the both area of cross section and length of material
Answer Explanation

MCQs 3: Which among the following is true about ohm’s law?

I ∝ V I = V/R V = IR All of these
Answer Explanation

MCQs 4: In any network of wires carrying currents, the algebraic sum of all currents meeting at a point is equal to

Sum of all the currents Zero Sum of outgoing current Sum of incoming current
Answer Explanation

MCQs 5: Electrical appliances which works on the electromagnetic principle is / are

Generators Motors Transformers All of these
Answer Explanation

MCQs 6: The materials with permeability less than unity are called

Diamagnetic materials Paramagnetic materials Ferromagnetic materials Anti ferromagnetic materials
Answer Explanation

MCQs 7: The magnetic materials which are strongly attracted by the magnet is

Diamagnetic materials Paramagnetic materials Ferromagnetic materials Anti ferromagnetic materials
Answer Explanation

MCQs 8: Permanent magnet are manufactured by

Copper sulphate Iron and cobalt Cobalt and nickel ALNICO
Answer Explanation

MCQs 9: The direction of magnetic materials when the current passes through the conductor is determined by

Right hand rule Maxwell’s corkscrew rule Left hand rule Only (a) and (b)
Answer Explanation

MCQs 10: Coulomb’s First Law states that

Unlike poles attract each other Like poles repel each other Unlike poles attract each other and like poles repel each other The force between two magnetic poles placed in a medium directly proportional to their pole strengths
Answer Explanation

MCQs 11: According to the couloumb’s second law, the force between two magnetic poles placed in a medium is

Directly proportional to their pole strengths. Inversely proportional to the square of the distance between them Inversely proportional to the absolute permeability of the surrounding medium All of these
Answer Explanation

MCQs 12: The unit of magnetic flux is

Maxwell Weber Weber - m Only (a) and (b)
Answer Explanation

MCQs 13: Reluctance in a magnetic material is a property by virtue of which it opposes the creation of

Electric flux Magnetic flux Electric field density Electric lines of force
Answer Explanation

MCQs 14: The unit of magnetizing field intensity is

Newton / Weber Ampere - turns / Weber Newton - m / Weber Only (a) and (b)
Answer Explanation

MCQs 15: According to the coulomb’s law, the force between two point charges is

Directly proportional to the product of the charges Inversely proportional to the square of the distance between them Along the line joining them All of these
Answer Explanation

MCQs 16: Electric field intensity is

Directly proportional to the force applied Inversely proportional to the force applied Directly proportional to the permittivity Inversely proportional to the charge
Answer Explanation

MCQs 17: The equation for electric flux density is given by

D = εV D = εE D = ε/E D = ε/V
Answer Explanation

MCQs 18: Electric flux density is a function of

Charge Position Medium Only (a) and (b)
Answer Explanation

MCQs 19: The most common waveforms of ac is

Square Triangular Sinusoidal Saw tooth
Answer Explanation

MCQs 20: A radian is defined as the central angle, for which length of its arc

Should be greater than radius Should be less than radius Should be equal to the radius None of these
Answer Explanation

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