What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ?
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A. 1A
B. 10A
C. 100A
D. 1000A
Physics MCQ's
Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?
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A. magnetic flux
B. magnetic field intensity
C. magnetic induction
D. self inductance
A million electron are added to a pith ball. Its charge is________?
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A. – 1.6 × 10–12 coulomb
B. – 1.6 × 10–13 coulomb
C. – 1.6 × 10 –18 coulomb
D. – 1.6 × 10 coulomb
The charge on alpha particles is________________?
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A. Plus one
B. Plus two
C. Minus two
D. Minus one
The charge on an electron was determine by ________________?
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A. Ampere
B. Maxwell
C. Millikan
D. Thomson
A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is_________________?
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A. independent mass m
B. directly proportional to m
C. directly proportional to q
D. directly proportional to B
A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?
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A. The extension of the wire is proportional to the force applied
B. The weight of the wire is negligible
C. The wire is not stretched beyond its elastic limit
D. The cross sectional area of the wire remains constant
In a semiconductors the charge carriers are ___________________?
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A. Holes only
B. Electrons only
C. Electron and holes both
D. All of the above
Electrons present in p-type material due to thermal pair generation are_____________?
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A. majority carriers
B. minority carriers
C. dual carriers
D. blockers
When a body is moving along a circular path it covers a certain angle in a given interval of time. Such type of motion is__________________?
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A. Vibratory motion
B. Linear motion
C. Rotatory motion
D. Angular motion