Marching soldiers crossing a suspension bridge are usually advised to break their steps to avoid damaging the bridge owing to
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2005
In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is
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2005
The pair of physical quantities consisting of vectors only are
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2005
A real image three times the size of an object is formed 24cm from a converging mirror. what is the focal length of the mirror.
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2005
A thin converging lens has a power of 4.0 diopters determined its focal length.
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2005
The sharpness of the boundary of the shadow of an object is determined by the
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2005
When impurities are added to semi-conductors, the conductivity of the semi-conductor
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2005
a proton moving with a speed of 1.0 x 106ms-1 through a magnetic field of 1.0T experiences a magnetic force of magnitude 8.0 x 10-14 N. The angle between the proton''s velocity and the field is
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2005
The time it will take a certain radioactive material with a half-life of 50 days to reduce to 1/32of its original number is
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2005
In an a.c circuit that contains only a capacitor, the voltage lags behind the current by
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2005
An object is projected for the hieght of 80 m above the ground with a velocity of 40ms-1 at the angle of 30° to the horizontal. The time of flight
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2005
A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil.
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2005
the ray which causes gas molecules to glow is known as
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2005
the ray which causes gas molecules to glow is known as
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2005
The charge carriers in gasses are
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2005
A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is
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2005
A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is?[g = 10ms2]
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2005
A 3m3 volume of liquid W of density 200kgm3 is mixed with another liquid L of volume 7m3 and density 150kgm-3. the density of mixture is?
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2005
When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that