Physics MCQS with Answers
A sun rise or sun set, the sun looks reddish because:
The sun is hottest at these times
Of the effects of reflection and refraction
The sun is coldest at these times
Of the scattering of light
Quantity that remains unchanged in a transformer is
Frequency
Voltage
None of these
Current
A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be
40 km/h
50 km/h
48 km/h
60 km/h
The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If 240 volts ac are applied to the primary, the output the secondary will be
12V
6V
24V
48A
The number of translation degrees of freedom for a diatomic gas is
6
5
3
2
Electrons in the atom are held in the atom due to
Coulomb forces
Van der Waal’s forces
Gravitational forces
Nuclear forces
The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is
625
225
1250
25
The essential distinction between X-rays and
Shunt required in an ammeter of resistance R to decrease its deflection from 30 ampere to 10 ampere is
R/4
R
R/2
R/3
Mechanical waves on the surfaces of a liquid are
Longitudinal
Torsional
Transverse
both transverse and longitudinal
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