10th Class Physics MCQS
The principal focus of a concave mirror is:
Real
Virtual
Imaginary
Dual aspect
The loudness of a sound is most closely related to its:
Wavelength
Frequency
Period
Amplitude
The distance of the object from the mirror is represented by :
F
m
p
q
Angle opposite to the base of triangle of prism is called:
angle of incidence
emerging angle
angle of prism
angle of refraction
The ray of the light after reflection from concave mirror passes through:
None of these
Principal focus
Pole
Centre
Which form of energy is sound:
Thermal
Electrical
Chemical
mechanical
Which types of image is formed by a concave lens on a screen?
Inverted and virtual
Inverted and real
Upright and virtual
upright and real
Focal length for concave mirror is :
ve
same
none of these
#NAME?
If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will.
refract only
partially refract and partially reflect
reflect only
Diffract only
For a normal person audible frequency range for sound wave lies between:
25 Hz and 25 kHz
30Hz and 30 kHz
20Hz and 20 kHz
10 Hz and 10kHz
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