A steady current is flowing through a solenoid. If a bundle
of soft iron is inserted in the coil, then the magnetic
field inside the solenoid
(3) remains unaffected
(4) increases first and then decreases
A bar magnet with poles N and S marked is freely suspended.
Then the end marked N would point towards
(1) the South magnetic pole of the earth
(2) the South geographic pole of the earth
(3) the North magnetic pole of the earth
(4) the North geographic pole of the earth
To demonstrate the phenomena of interference, we require
(1) Two sources which emit radiation of the same frequency
(2) Two sources which emit radiation of nearly the same
(3) Two sources which emit radiation of the same frequency
and have a definite phase relationship
(4) Two sources which emit radiation of different wavelengths
Which of the following statements is true ?
(1) The speed of light in a vacuum depends upon the wavelength
(2) The speed of light in a vacuum depends upon the frequency
(3) The speed of light depends on wavelength, and not on
(4) The speed of light is independent of frequency and
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