In Young's double slit interference experiment, the slit separation is made 3 fold. The fringe width becomes
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(a) 1/3 times |
(b) 1/9 times |
(c) 3 times |
(d) 9 times |
(a) 1/3 times
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Assertion : A charged capacitor is disconnected from a battery. Now if its plate are separated farther, the potential energy will fall.
Reason : Energy stored in a capacitor is equal to the work done in charging it.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
Assertion : The coil is bound over the metallic frame in moving coil galvanometer.
Reason : The metallic frame help in making steady deflection without any oscillation.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
In an electric heater 4 amp current passes for 1 minute at potential difference of 250 volt, the power of heater and energy consumed will be respectively
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(a) 1 kW, 60 kJ |
(b) 0.5 kW, 30 kJ |
(c) 10 kW, 600 kJ |
(d) None of these |
The ratio of electric fields on the axis and at equator of an electric dipole will be
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(a) 1 : 1 |
(b) 2 : 1 |
(c) 4 : 1 |
(d) None of these |
The range of wavelength of the visible light is
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(a) 10 Å to 100 Å |
(b) 4,000 Å to 8,000 Å |
(c) 8,000 Å to 10,000 Å |
(d) 10,000 Å to 15,000 Å |
In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air (μ = 1) will be equal to
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(a) |
(b) |
(c) |
(d) |
