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When the current i is flowing through a conductor, the drift velocity is v. If 2i current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be
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(a) v/4 |
(b) v/2 |
(c) v |
(d) 4v |
All of the following statements are correct except
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(a) The magnification produced by a convex mirror is always less than one |
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(b) A virtual, erect, same-sized image can be obtained using a plane mirror |
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(c) A virtual, erect, magnified image can be formed using a concave mirror |
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(d) A real, inverted, same-sized image can be formed using a convex mirror |
The wavelength of light diminishes μ times (μ = 1.33 for water) in a medium. A diver from inside water looks at an object whose natural colour is green. He sees the object as
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(a) Green |
(b) Blue |
(c) Yellow |
(d) Red |
The resultant capacitance between A and B in the following figure is equal to
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(a) 1 μF |
(b) 3 μF |
(c) 2 μF |
(d) 1.5 μF |
Which of these is a fusion reaction
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(a) |
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(b) |
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(c) |
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(d) None of these |
