In the circuit diagram above, the ammeter reads a current of 3A when R is 5 ohms and 6A when R is 6 ohms,the value of the unknown resistance X is
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1988
The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same dir…
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1988
E, F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is
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1988
In the figure above, what is the angle of reflection of the ray of light at mirror M?
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1988
The figure above shows two waveforms X and Y. If the frequency of X is 30Hz what is the frequency of Y
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1988
A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is
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1988
When three coplanar non-parallel are in equilibrium.i. they can be represented in magnitude and direction by the three sides of a triangle taken in order. ii. the lines of action meet at a point. iii. the magnitude of an…