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Electricity Fundamentals MCQ - Multiple Choice Question and Answer

Electricity Fundamentals MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 15
States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

Wien's displacement law
Hartleys law
Hall's law
Wiedemann Franz law

Question No : 16
A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed loop of a magnetic circuit is equal to zero.

Kirchhoff's circuital law
Maxwell's circuital law
Ampere's circuital law
Coulomb's circuital law

Question No : 17
The net electrical charge in an isolated system remains constant. This is known as

Law of conservation of charge
Coulomb's first law
Coulomb's second law
Law of conservation of energy

Question No : 18
Lenz's law is the consequence of the law of conservation of

Energy
Charge
Field lines
Momentum

Question No : 19
Lenz' law states that the direction of the induced emf and hence current

Is determined by the rate of current flux
Is found by the right hand rule
Is found by the left hand rule
Always opposes the cause producing it

Question No : 20
If you hold the conductor with right hand so that the stretched thumb points in the direction of the currenta then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as

Left hand cork screw rule
Right hand cork screw rule
Left hand rule
Right hand rule

Question No : 21
If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in the direction of current flow, the motion of its handle will indicate the direction of magnetic flux produced around the conductor. This is known as

Right hand rule
Left hand rule
Cork screw rule
End rule