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Free tnpsc model questions Online Test - MeritNotes
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No. of Questions :10
Remaining Time :
1. In an electromagnetic wave,
(a)
power is transmitted in a direction perpendicular to both the fields
(b)
power is transmitted along electric field
(c)
power is transmitted along magnetic field
(d)
power is equally transferred along the electric and magnetic fields
2. Corpuscular theory can explain the phenomenon of
(a)
diffraction
(b)
reflection
(c)
interference
(d)
polarisation
3. When the light emitted directly from a source is examined with a spectrometer, the spectrum obtained is _____ spectrum.
(a)
emission
(b)
pure
(c)
absorption
(d)
dull
4. _____ is used to improve colour contrasts in old oil paintings.
(a)
Pile of plates
(b)
Nicol prism
(c)
Polaroids
(d)
None of the above
5. A changing magnetic field at a point with time produces an electric field. This idea was put forth by
(a)
Oersted
(b)
Huygen
(c)
Maxwell
(d)
Faraday
6. When the angle of incidence increases beyond the critical angle
(a)
refracted wavefront is possible at times
(b)
no refracted wavefront is possible
(c)
a refracted wavefront is just possible
(d)
a refracted wavefront in possible
7. Corpuscular theory states that light energy is the _____ energy of corpuscles.
(a)
atomic
(b)
magnetic
(c)
potential
(d)
kinetic
8. The angle of incidence for which the reflected ray is completely plane polarised is
(a)
critical angle
(b)
angle of polarisation
(c)
angle of refraction
(d)
angle of reflection
9. _____ spectrum is used to analyse the chemical constitution.
(a)
Absorption
(b)
Raman
(c)
Interference
(d)
Emission
10. The energy in an electromagnetic wave is
(a)
zero
(b)
equally divided between electric and magnetic field
(c)
wholly shared only by magnetic field vector
(d)
wholly shared only by electric field vector
