In the normal use of a simple microscope, a person sees an
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2003
Calculate the amount of heat generated in an external load of resistance 8Ω if an alternating current of peak value 5 A is passed through it for 100s.
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2003
Evaporation of a liquid produces cooling of the liquid because the
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2003
Which of the following instruments can be used to measure e.m.f. most accurately.
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2003
Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exceed the
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2003
Which of the following radiations have the longest wavelength?
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2003
How much heat is required to convert 50g of water at 100°C to steam at the same temperature? (Specific latent heat of vaporization of water = 2260 Jg-11)
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2003
For which of the following sets are the units fundamental?
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2003
The motion of the prongs of a sounding turning fork is
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2003
Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is
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2003
A body that produces its own light is said to be
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2003
Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?
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2003
A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statem…
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2003
The S.l unit of magnetic flux density is
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2003
A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g=10ms-2)
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2003
A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.
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2003
A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary?
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2003
A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the
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2003
Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33)
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2003
The space surrounding a magnet in which the magnetic force is exerted is