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Showing 21 to 40 out of 2842 Doubts
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Ques . A car travelling at 60 km/h overtakes another car traveling at 42 km/h . Assuming each car to be 5 m long, find the time taken during the overtake and the totl road distance used for overtake .
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a mixture of feo and fe3o4when heated in air to constant weight gains 5%ofits weight the%of feo in the sample is
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A body starts from rest from a point at a distance ro>Re from the centre of earth.It reaches the surface of earth.What is the velocity acquired by the body?
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two small bodies of masses 10kg and 2okg are kept a distance 1.0m apart and released.Assuming that only muutual gravitational forces are acting,find the speeds of the particles when the sepration decreases to 0.5m.
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What does exactly make heavy nucleus unstable?
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When a tiny circular obstacle is placed in the path of light from a distant source a bright spot is seen at the centre of the shadow of the obstacle. explain why?
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In a single slit diffraction experiment,the width of the slit is made double the original width. how does this affect the size and intensity of the central diffraction band?
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What is the shape of the wavefront in each case
i) light diverging from a point source.
ii) light emerging out of a convex lens when a point source is placed at its focus?
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why are optical fibres extensively used for transmitting audio and video signals? give the working of core and cladding.
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A potential difference V is applied to a copper wire od diameter d and length l. what is the on the electron drift speed of-
i) doubling l
ii) doubling V
iii) doubling d?
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Three condensers each of capacity 3 mue farad are arranged in such a way so that equivalent capacity is 2 mue farad. draw arrangement?
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Can we have a condenser of 1 farad capacity? give reason.
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What is meaning of toppling? Describe in Detail with examples.
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what is tautomerism ,plz explain in detail
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how does the power of the lens changes when red light is replaced by violet??
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is matter wave electromagnetic wave?
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will in a standing wave sound will produce?
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what do you mean by interference of wave?
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A capacitor of capacitance C1 = 1 x 10 -4 F is charged by pd of 110 V. It is connected in parallel to the terminals of a circuit consisting of two uncharged capacitors, connected in series and possessing the capacitances C2 = 2 x 10 -3 F, C3 = 3 x 10 -3 F. What charge(mC) will flow through the connecting wires ?
Showing 21 to 40 out of 2842 Doubts
