In an interference pattern produced by two identical slits, the intensity at the site of maxima is I. When one of the slit is closed, the intensity at the same spot is I0. What is the relation between I and \(I_0\)
(a) I = 2 \(I_0\)
(b) I = 4 \(I_0\)
(c) I = 16 \(I_0\)
(d) I = \(I_0\)
(a) I = 2 \(I_0\)
(b) I = 4 \(I_0\)
(c) I = 16 \(I_0\)
(d) I = \(I_0\)
(b) I = 4 \(I_0\)
The intensity of light emerging from the two slits, in Young’s experiment is in the ratio 1 : 4. The ratio of the intensity of the minimum to that of the consecutive maximum will be:
(a) 1 : 4
(b) 1 : 9
(c) 1 : 16
(d) 2 : 3
Two coherent monochromatic light beams of intensities I and 41 superimpose. The maximum and minimum possible intensities in the resulting beam are:
(a) 5I and I
(b) 5I and 3I
(c) 3I and I
(d) 9I and I
Two monochromatic light waves of amplitudes 3A and 2A interfering at a point having phase difference of \(60^\circ\). The intensity of light at that point will be
(A) 5\(A^2\)
(B) 13\(A^2\)
(C) 7\(A^2\)
(D) 19\(A^2\)
Ratio of intensities of two waves are given by 4 :1. Then the ratio of the amplitudes of the two waves.
(a) 2 : 1
(b) 1 : 2
(c) 4 : 1
(d) 1 : 4
In a Young’s double slit experiment the distance between the slit is 1 mm and the distance of screen from the slit is 1 m. If light of wavelength 6000 A is used then the fringe width is:
(a) 0.4 mm
(b) 0.5 mm
(c) 0.6 mm
(d) 0.8 mm
Two interfering beams have intensities in the ratio of 9:4. Then the ratio of maximum to minimum intensity in the interference pattern is
(A) 25:1
(B) 13:5
(C) 5:1
(D) 3:2
What is the effect on the angular width of interference fringes in a Young’s double slit experiment when the screen moved near to the plane of slits.
(a) increases
(b) decreases
(c) constant
(d) not defined
Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?
(a) Solid sphere
(b) Hollow sphere
(c) Both will have an equal charge
(d) None of these
Two anti-parallel conducting wires carrying currents in the ratio 2:3. What is the nature of the force acting between them?
a) Attractive
b) Repulsive
c) Both attractive and Repulsive
d) can not predict.
For sustained interference, we need two sources which emit radiations:
(a) of the same intensity
(b) of the same amplitude
(c) having a constant phase difference
(d) None of these
A charge q is placed at one corner of the cube. The electric flux passing through any one of its face is
A wire in the form of a circular loop, of one turn carrying a current, produces magnetic induction B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is-
a) B
b) 4B
c) 2B
d) 8B.
Two balls carrying charges - and +8 attract each other with a force F. If a charge of -3 is added to both the balls, then the force between then will become
A. 2F
B. F/2
C. F
D. zero
The dimensional representation of \(ε_0\) will be
A. [\(MLT^2\)\(A^2\)]
B. [\(M^{-1}\) \(L^{-3}\) \(T^4\) \(A^2\)]
C. [\(ML^{-2}\)\(T^2\) \(A^{-2}\)]
D. none of these