The unit of coefficient of linear expansion or volume expansion is__________?
The unit of coefficient of linear expansion or volume expansion is__________?A. K
B. K-1
C. K -2
D. none
B. K-1
C. K -2
D. none
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A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?
A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?A. 2.0 mA
B. 20 mA
C. 200 mA
D. 0.2 mASemi-conductors with donor atoms and free electrons belong to the type________________?
Semi-conductors with donor atoms and free electrons belong to the type________________?A. n
B. p
C. mix
D. any of aboveWhich one of the following is not an electromechanical instrument ?
Which one of the following is not an electromechanical instrument ?A. galvanometer
B. voltmeter
C. ammeter
D. AC transformer and DC generatorThe escape velocity form the earth surface in km S-1 is____________________?
The escape velocity form the earth surface in km S-1 is____________________?A. 4.2 km S-1
B. 7.5 km S-1
C. 9.5 km S-1
D. 1.1 km S-1In vibrating cord the points where the amplitude is maximum, are called ___________________?
In vibrating cord the points where the amplitude is maximum, are called ___________________?A. antinodes
B. nodes
C. troughs
D. crestsIf a diffraction grating is placed in the path of a light beam it reveals______________?
If a diffraction grating is placed in the path of a light beam it reveals______________?A. Wave property
B. Particle property
C. Energy particle
D. Electromagnetic wave property