Two coherent sources separated by distance d are radiating in phase having wavelength l. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of n = 4 interference maxima is given as
|
(a) |
(b) |
(c) |
(d) |
(b) 
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A particle of mass M and charge Q moving with velocity 
describes a circular path of radius R when subjected to a uniform transverse magnetic field of induction B. The work done by the field when the particle completes one full circle is
|
(a) BQv2πR |
(b) |
(c) Zero |
(d) BQ |
Great bear is a
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(a) Star |
(b) Galaxy |
(c) Constellation |
(d) Planet |
For ferromagnetic material, the relative permeability (
, versus magnetic intensity (H) has the following shape
|
(a)
|
(b)
|
(c)
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(d)
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The magnetic flux linked with a coil, in webers, is given by the equations ∅ = 
Then the magnitude of induced e.m.f. at t = 2 second will be
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(a) 2 volt |
(b) 4 volt |
(c) 8 volt |
(d) 16 volt |
Two parallel pillars are 11 km away from an observer. The minimum distance between the pillars so that they can be seen separately will be
|
(a) 3.2 m |
(b) 20.8 m |
(c) 91.5 m |
(d) 183 m |
Carbon dating is best suited for determining the age of fossils if their age in years is of the order of
(a) 
|
(b) 
|
(c) 
|
(d) 
|
Which of the following is not a correct statement
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(a) The wavelength of red light is greater than the wavelength of green light |
|
(b) The wavelength of blue light is smaller than the wavelength of orange light |
|
(c) The frequency of green light is greater than the frequency of blue light |
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(d) The frequency of violet light is greater than the frequency of blue light |
Two identical point charges are placed at a separation of d. P is a point on the line joining the charges, at a distance x from any one charge. The field at P is E, E is plotted against x for values of x from close to zero to slightly less than d. Which of the following represents the resulting curve
|
(a)
|
(b)
|
(c)
|
(d)
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