When X rays pass through a strong uniform magnetic field, Then they
|
(a) Do not get deflected at all |
|
(b) Get deflected in the direction of the field |
|
(c) Get deflected in the direction opposite to the field |
|
(d) Get deflected in the direction perpendicular to the field |
(a) Do not get deflected at all
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A step up transformer has transformation ration 5 : 3. What is voltage in secondary if voltage in primary is 60 V
|
(a) 20 V |
(b) 60 V |
(c) 100 V |
(d) 180 V |
In Fresnel’s biprism (μ = 1.5) experiment the distance between source and biprism is 0.3 m and that between biprism and screen is 0.7m and angle of prism is 1°. The fringe width with light of wavelength 6000 Å will be
|
(a) 3 cm |
(b) 0.011 cm |
(c) 2 cm |
(d) 4 cm |
The energy of hydrogen atom in its ground state is – 13.6 eV. The energy of the level corresponding to the quantum number n is equal 5 is
|
(a) – 5.40 eV |
(b) – 2.72 eV |
(c) – 0.85 eV |
(d) – 0.54 eV |
Which of the following statement is wrong
|
(a) Infrared photon has more energy than the photon of visible light |
|
(b) Photographic plates are sensitive to ultraviolet rays |
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(c) Photographic plates can be made sensitive to infrared rays |
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(d) Infrared rays are invisible but can cast shadows like visible light rays |
The current in a coil decreases from 1 A to 0.2 A. In 10sec. Calculate the coefficient of self inductance. If induced emf is 0.4 volt.
|
(a) 5 H |
(b) 3 H |
(c) 4 H |
(d) 2 H |
The current in the given circuit is
|
(a) 0.1 A |
(b) 0.2 A |
(c) 0.3 A |
(d) 0.4 A |