Hi friends, these are some of the multiple choice questions on electrical and magnetic properties. These are some of the basic questions which are asked in previous competitive papers check out and comment...
1) The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as
A) Newton’s first law
B) Faraday’s first law of electromagnetic induction
C) Coulomb’s first law
D) Coulomb’s second law
Ans:D
2) Whenever a conductor cuts magnetic flux, an emf is induced in it. This is known as
A) Coulomb’s law
B) Joule’s law
C) Faraday’s law
D) Ohm’s law
Ans:C
3) A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction.
A) Joule’s law
B) Faraday’s law
C) Coulomb’s law
D) Lenz law
Ans:D
4) A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodes, provided operating conditions are such that the current is limited only by the space charge.
A) Hall’s law
B) Joule’s law
C) Child's law
D) Coulomb’s law
Ans:C
5) States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.
A) Wien’s displacement law
B) Hartley's law
C) Hall’slaw
D) Wiedemann Franz law
Ans:D
6) A law establishing the fact that the algebraic sum of the rises and drops of the mmf around a closed loop of a magnetic circuit is equal to zero.
A) Kirchhoff’ s circuital law
B) Maxwell’s circuital law
C) Ampere's circuital law
D) Coulomb’s circuital law
Ans:C
7) The net electrical charge in an isolated system remains constant. This is known as
A) Law of conservation of charge
B) Coulomb’s first law
C) Coulomb’s second law
D) Law of conservation of energy
Ans:A
8) Lenz’s law is the consequence of the law of conservation of
A) Energy
B) Charge
C) Field lines
D) Momentum
Ans:A
9) Lenz’ law states that the direction of the induced emf and hence current
A) Is determined by the rate of current flux
B) ls found by the right hand rule
C) Is found by the left hand rule
D) Always opposes the cause producing it
Ans:D
10) If you hold the conductor with right hand so that the stretched thumb points in the direction of the current, then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as
A) Left hand cork screw rule
B) Right hand cork screw rule
C) Left hand rule
D) Right hand rule
Ans:D
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1) The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as
A) Newton’s first law
B) Faraday’s first law of electromagnetic induction
C) Coulomb’s first law
D) Coulomb’s second law
Ans:D
2) Whenever a conductor cuts magnetic flux, an emf is induced in it. This is known as
A) Coulomb’s law
B) Joule’s law
C) Faraday’s law
D) Ohm’s law
Ans:C
3) A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction.
A) Joule’s law
B) Faraday’s law
C) Coulomb’s law
D) Lenz law
Ans:D
4) A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodes, provided operating conditions are such that the current is limited only by the space charge.
A) Hall’s law
B) Joule’s law
C) Child's law
D) Coulomb’s law
Ans:C
5) States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.
A) Wien’s displacement law
B) Hartley's law
C) Hall’slaw
D) Wiedemann Franz law
Ans:D
6) A law establishing the fact that the algebraic sum of the rises and drops of the mmf around a closed loop of a magnetic circuit is equal to zero.
A) Kirchhoff’ s circuital law
B) Maxwell’s circuital law
C) Ampere's circuital law
D) Coulomb’s circuital law
Ans:C
7) The net electrical charge in an isolated system remains constant. This is known as
A) Law of conservation of charge
B) Coulomb’s first law
C) Coulomb’s second law
D) Law of conservation of energy
Ans:A
8) Lenz’s law is the consequence of the law of conservation of
A) Energy
B) Charge
C) Field lines
D) Momentum
Ans:A
9) Lenz’ law states that the direction of the induced emf and hence current
A) Is determined by the rate of current flux
B) ls found by the right hand rule
C) Is found by the left hand rule
D) Always opposes the cause producing it
Ans:D
10) If you hold the conductor with right hand so that the stretched thumb points in the direction of the current, then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as
A) Left hand cork screw rule
B) Right hand cork screw rule
C) Left hand rule
D) Right hand rule
Ans:D
If you like my post please share it with your friends and subscribe to latest updates.. If you have doubts you can start new topic on forum and start discussion with our readers..
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