The temperature at which the water vapour present in the air is just sufficient to saturate air is
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2014
The melting point of a substance is equivalent to its
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2014
The quantity of heat needed to raise the temperature of a body by 1K is the body's
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2014
In a compound microscope, the objective and the eye piece focal lengths are
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2014
The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it, the image is at
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2014
An object is placed 10m from a pinhole camera of length 25cm. Calculate the linear magnification.
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2014
A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill?
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2014
A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when
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2014
If a metal wire 4m long and cross-sectional area 0.8 mm2 has a resistance of 60, find the resistivity of the wire
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2014
The maximum power transfer occur in a cell when the external resistance is
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2014
What charge is stored in a 0.1F capacitor when a 10V supply is connected across it?
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2014
When a negatively charged rod is brought near the cap of a charged gold leaf electroscope which has positive charges, the leaf
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2014
Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3x10-7kgC-1]
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2014
When an atom undergoes a beta decay, the atomic number of the nucleus
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2014
The magnitude of the angle of dip at the equator is
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2014
What is the best method of demagnetizing a steel bar magnet?
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2014
PHCN measures its electrical energy in
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2014
A glass bottle of initial volume 2 x 104 cm3 is heated from 20oC to 50oC. If the linear expansivity of glass is 9 x 106K-1, the volume of the bottle at 50oC is
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2014
What type of reaction is represented by the equation \(^{2}_{1}X+^{2}_{1}X\rightarrow^{3}_{2}Y+^{1}_{0}n+Energy\)
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2014
When \(^{210}_{82}Pb\) decays to \(^{206}_{80}Pb\), it emits