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.Management Sciences
Category: Physics Mcqs
Which one of the following is not an electromechanical instrument ?
A. galvanometer
B. voltmeter
C. ammeter
D. AC transformer and DC generator
appearance of colour in thin films is due to ____________________?
A. diffraction
B. dispersion
C. interference
D. polarization
The working of transistor as amplifier is similar to________________?
A. Step up transformer
B. Step down transformer
C. Three diodes in common
D. Triode vacuum tube
Waves transmit ________________ from one place to another?
A. energy
B. mass
C. both
D. none
In multimode step index fibre the refractive index of core and cladding is____________?
A. same
B. different
C. zero
D. different with refractive index of core higher than cladding
The direction of propagation of an electromagnetic waves is________________?
A. Perpendicular to electric field
B. Perpendicular to both electric and magnetic field
C. Perpendicular to magnetic field
D. Parallel to electric and magnetic field
A chimney works best if air exposed to the chimney is______________?
A. Stationary
B. Moving
C. Moving slowly
D. Moving fast
Forced vibration is known as_____________________?
A. Simple harmonic vibration
B. Natural vibration
C. Driven harmonic vibration
D. Free vibration
Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?
A. A & B
B. B & C
C. A & C
D. A B & C
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