The diagram above represents a transverse electromagnetic wave travelling with speed 3.0 x 108ms-1. What is the frequency of the wave.
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1999
In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the…
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1999
The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston
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1999
The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct
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1999
The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W.
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1999
In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P1 and P2 dissipated by R1 and R2
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1999
In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is
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1999
In the circuit above, the ammeter reads a current of 5.0 A when R = 8Ω and reads 7.0A when R = 5Ω. The value of the unknown resistance X is
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1999
The diagram above shows a magnet X with its south pole moved along a soft - iron bar PQ in the direction shown. After some time, the poles at P and Q respectively are
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1999
The diagram above shows the prism arrangement in a
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1999
In the series a.c circuit shown above, the p.d across the inductor is 8Vr.m.s and that across the resistor is 6Vr.m.s. The effective voltage is
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1999
I. A liquid boils when its saturated vapour pressure is equal to the external pressureII. Dissolved substances in pure water lead to increase in the boiling point.III. When the external pressure is increased, the boiling…
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1999
Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced.