- AProduce fluoroscence.
- BTravel through vacuum.
- CGet deflected by electric and magnetic fields.
- DCast shadow.
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What should be the current in a circular coil of radius 5cm to annul
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(a) 0.4 A |
(b) 4 A |
(c) 40 A |
(d) 1 A |
In Young's double slit experiment, a glass plate is placed before a slit which absorbs half the intensity of light. Under this case
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(a) The brightness of fringes decreases |
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(b) The fringe width decreases |
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(c) No fringes will be observed |
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(d) The bright fringes become fainter and the dark fringes have finite light intensity |
In hydrogen atom, the electron makes 6.6 revolutions per second around the nucleus in an orbit of radius 0.5
. It is equivalent to a current nearly
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(a) 1 A |
(b) 1 mA |
(c) 1 μA |
(d) 1.6 |
A current carrying rectangular coil is placed in a uniform magnetic field. In which orientation, the coil will not tend to rotate
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(a) The magnetic field is parallel to the plane of the coil |
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(b) The magnetic field is perpendicular to the plane of the coil |
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(c) The magnetic field is at 45o with the plane of the coil |
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(d) Always in any orientation |
Which one of the series of hydrogen spectrum is in the visible region
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(a) Lyman series |
(b) Balmer series |
(c) Paschen series |
(d) Bracket series |
What happens to the fringe pattern when the Young’s double slit experiment is performed in water instead or air then fringe width
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(a) Shrinks |
(b) Disappear |
(c) Unchanged |
(d) Enlarged |