An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
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A. 3.5 x 10-3 J
B. 3.5 x 104 J
C. 3.5 x 106 J
D. 3.5 x 109 J
Physics MCQ's
If a wire has a resistance of 0.5 ohm, then its conductance is:
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A. 1 S
B. 1.5 S
C. 2 S
D. 5 S
Minimum current required to produce a deflection of 1 mm on a scale at a distance of 1 meter is__________________?
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A. 0.1 A
B. 1:00 AM
C. current sensitivity
D. 1 m A
The sensitivity of a galvanometer is given by__________________?
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A. C/BAN
B. CAN/B
C. BAN/C
D. ABC/N
The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12Ω. Galvanometer resistance is_____________?
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A. 18Ω
B. 30Ω
C. 24Ω
D. 12Ω
The magnetic field strength of solenoid is__________________?
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A. B = μNI
B. B = μN/I
C. B = μnI
D. Both B and C
Value of permeability of free space in SI units is___________________?
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A. 4πx10-9 WbA-1m-1
B. 4πx10-7 WbA-1m-1
C. 4πx10-10 WbA-1m-1
D. 4πx10-8 WbA-1m-1
The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________?
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A. a circle
B. a spiral
C. an ellipse
D. helix
Magnetic flux and flux density are related by___________________?
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A. magnetic flux = flux density / area
B. magnetic flux = flux density x area
C. flux density = magnetic flux area
D. flux density = magnetic flux x area
If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?
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A. τ = NIAB cosφ
B. τ = NIAB sinφ
C. τ = NIAB tanφ
D. τ = NIAB