What is the reason for your answer to the above question?
(a) The two sources do not emit light of the same wavelength.
(b) The two sources emit waves which travel with different speeds.
(c) The two sources emit light waves of different amplitudes.
(d) There is not constant phase difference between the waves emitted by the two sources.
(a) The two sources do not emit light of the same wavelength.
(b) The two sources emit waves which travel with different speeds.
(c) The two sources emit light waves of different amplitudes.
(d) There is not constant phase difference between the waves emitted by the two sources.
(d) There is not constant phase difference between the waves emitted by the two sources
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
To observe diffraction, the size of the obstacle
(a) should be X/2, where X is the wavelength.
(b) should be of the order of wavelength.
(c) has no relation to wavelength.
(d) should be much larger than the wavelength.
To observe diffraction, the size of the obstacle
(a) should beX/2, where X is the wavelength.
(b) should be of the order of wavelength.
(c) has no relation to wavelength.
(d) should be much larger than the wavelength.
Which of the following statements indicates that light waves are transverse?
(a) Light waves can be polarised
(b) Light waves can show interference
(c) Light waves undergo diffraction
(d) They travel in the vacuum
To obtain a sustained interference pattern we require two sources which emit radiation of
(A) the same frequency
(B) nearly same frequency
(C) the same frequency having a definite phase relationship
(D) different wavelengths
Two sources of light are said to be coherent when both give out light waves of the same:
(a) amplitude and phase.
(b) intensity and wavelength.
(c) speed.
(d) wavelength and a constant phase difference.
To observe diffraction, the size of the obstacle
a. should beX/2, where X is the wavelength.
b. should be of the order of wavelength.
c. has no relation to wavelength.
d. should be much larger than the wavelength
To observe diffraction, the size of the obstacle
(a) should beX/2, where X is the wavelength.
(b) should be of the order of wavelength.
(c) has no relation to wavelength.
(d) should be much larger than the wavelength.
In highly inductive load circuit, it is more dangerous when
(a) we close the switch
(b) open the switch
(c) increasing the resistance
(d) decreasing the resistance
The electric potential due to point charge 3 nC at distance of 9 cm is
(a) 270 v
(b) 3 v
(c) 300 v
(d) 30 v
When a person standing barefoot on the ground comes in contact with a high-power line, he is likely to
A. experience a total shock
B. experience a mild shock
C. experience a moderate shock
D. remain unaffected
High voltage transmission line is preferred as
(a) Its appliances are less costly
(b) Thin power cables are required
(c) Idle current very low
(d) Power loss is very less
When a body charges by conduction, its mass
(A) Remains same
(B) Increases
(C)Decreases
(D)Increase or decrease
To convert a moving coil galvanometer into on ammeter of given range, we must connect:
(a) A suitable low resistance in series
(b) A suitable low resistance in parallel
(c) A suitable high resistance in parallel
(d) A suitable high resistance in series