Physics-
General
Easy
Question
A student is asked to connected four cells of e.m.f of 1 V and internal resistance 0.5 ohm in series with an external resistance of 1 ohm. But one cell is wrongly connected by him with its terminal reversed, the current in the circuit is
The correct answer is:
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If the external resistance is equal to the internal resistance of a cell of emf E. The p.d. across its terminal is
If the external resistance is equal to the internal resistance of a cell of emf E. The p.d. across its terminal is
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The temperature coefficient of resistivity of material is 0.0004/k. When the temperature of the material is increased by 50°C, its resistivity increases by 
. The initial resistivity of the material in ohm-m is
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The effective resistance between A and B in the given circuit is
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The effective resistance between A and B in the given circuit is
The effective resistance between A and B in the given circuit is
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The effective resistance between A and B in the given circuit is
The effective resistance between A and B in the given circuit is
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The U-tube shown has a uniform cross section. A liquid is filled in the two arms up to heights 
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There are two identical small holes, on the opposite sides of a tank containing a liquid. The tank is open at the top. The difference in height between the two holes is h. As the liquid comes out of the two holes.
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As a liquid of density 
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A square box of water has a small hole located in one of the bottom corner. When the box is full and sitting on a level surface, complete opening of the hole results in a flow of water with a speed 
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A square box of water has a small hole located in one of the bottom corner. When the box is full and sitting on a level surface, complete opening of the hole results in a flow of water with a speed , as shown in figure. When the box is still half empty, it is tilted by 45° so the hole is at the lowest point Now the water will flow out with speed of
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The velocity of the liquid coming out of a small hole of a vessel containing two different liquids of densities 
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A cylinder of square base (b × b) is kept on a rough horizontal surface so that it cannot slide but topple only. It is filled with water up to a height 2 h and a small hole of area a is punched in it at a height h. Water Leaks out horizontally from the hole. For what value of 'h', the cylinder does not get toppled?
A cylinder of square base (b × b) is kept on a rough horizontal surface so that it cannot slide but topple only. It is filled with water up to a height 2 h and a small hole of area a is punched in it at a height h. Water Leaks out horizontally from the hole. For what value of 'h', the cylinder does not get toppled?
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A vessel contains oil (density 
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A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg. A block of mass 2 kg and specific gravity 10 is suspended by means of thread from a spring balance as shown. The readings of scales 
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A square plate of 0.1 meter side moves parallel to a second fixed plate with a velocity of 0.1 m/s, both plates being immersed in water. If the viscous force is 0.002 newtons and the coefficient of viscosity is 0.01 poise, distance between the plates in metre is
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