MCQ
The reason for attractive force between two parallel wires in which current is flowing in same direction is:
- Aelectromotive force between them
- Bmutual inductance between them
- Celectric force between them
- ✓magnetic force between them
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The minimum distance between an object and its real image formed by a convex lens is
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(a) 1.5 f |
(b) 2 f |
(c) 2.5 f |
(d) 4 f |
In Young’s double slit experiment, the aperture screen distance is 2m. The fringe width is 1 mm. Light of 600 nm is used. If a thin plate of glass (m = 1.5) of thickness 0.06 mm is placed over one of the slits, then there will be a lateral displacement of the fringes by
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(a) 0 cm |
(b) 5 cm |
(c) 10 cm |
(d) 15 cm |
Radioactive element decays to form a stable nuclide, then the rate of decay of reactant
will vary with time (t) as shown in figure
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(a)
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(b)
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(c)
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(d)
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