1) The magnetic materials which are strongly attracted by the magnet is
a. Diamagnetic materials
b. Paramagnetic materials
c. Ferromagnetic materials
d. Anti ferromagnetic materials
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Answer
Explanation
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ANSWER: Diamagnetic materials
Explanation:
No explanation is available for this question!
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2) Permanent magnet are manufactured by
a. Copper sulphate
b. Iron and cobalt
c. Cobalt and nickel
d. ALNICO
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Answer
Explanation
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ANSWER: ALNICO
Explanation:
No explanation is available for this question!
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3) The direction of magnetic materials when the current passes through the conductor is determined by
a. Right hand rule
b. Maxwell’s corkscrew rule
c. Left hand rule
d. Only (a) and (b)
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Answer
Explanation
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ANSWER: Only (a) and (b)
Explanation:
No explanation is available for this question!
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4) Electrical appliances which works on the electromagnetic principle is / are
a. Generators
b. Motors
c. Transformers
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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5) According to the End Rule, the current directions when looked from one end of the coil if that end is South Pole and if the end is North Pole are
a. Both clockwise
b. Anticlockwise, clockwise
c. Clockwise, anticlockwise
d. Both anticlockwise
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Answer
Explanation
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ANSWER: Clockwise, anticlockwise
Explanation:
No explanation is available for this question!
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6) If two conductors carrying currents in opposite direction are placed parallel to each other then the magnetic field set up by the conductors
a. Attract each other
b. Repels each other
c. Perpendicular to each other
d. Parallel to each other
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Answer
Explanation
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ANSWER: Repels each other
Explanation:
No explanation is available for this question!
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7) When a solenoid attracts an iron bar,
a. They leave the south pole to go around to the north pole
b. They leave the north pole to go around to the south pole
c. They leave the north pole to go to infinity
d. They leave the south pole to go to the infinity
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Answer
Explanation
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ANSWER: They leave the north pole to go around to the south pole
Explanation:
No explanation is available for this question!
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8) The amount of flux density set up in the core is dependent upon
a. Current
b. No. of turns, cross sectional area of core
c. Materials of the magnetic core, length of core
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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9) Permeability of a material is
a. Directly proportional to both flux density and magnetizing force
b. Directly proportional to flux density and inversely proportional to the magnetizing force
c. Directly proportional to the magnetizing force and inversely proportional to the flux density
d. Inversely proportional to both flux density and magnetizing force
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Answer
Explanation
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ANSWER: Directly proportional to flux density and inversely proportional to the magnetizing force
Explanation:
No explanation is available for this question!
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10) The materials with permeability less than unity are called
a. Diamagnetic materials
b. Paramagnetic materials
c. Ferromagnetic materials
d. Anti ferromagnetic materials
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Answer
Explanation
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ANSWER: Diamagnetic materials
Explanation:
No explanation is available for this question!
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