A ray of light is incident on an equilateral triangular glass prism of refractive index 3/2. Calculate the angle through which the ray is minimally deviated in the prism?
A. 30.0° B. 37.2° C. 42.0° D. 48.6° Correct Answer: Option B – 37.2°
A bead traveling on a straight wire is brought to rest at 0.2m by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1 determine the work done by the friction?
A. 2×10‾3J B. 2×10‾3J C. 2×101J D. 2×102J Correct Answer: Option B Explanation Work done by friction = Friction force x Displacement from the relation, f = uR where u = coefficient of friction; R= Normal reaction F = u mg (R =mg) = 0.1 x 0.01 x 10 work done = F x...
When a nucleus is formed by bringing protons and neutrons together; the actual mass of the formed nucleus is less than the sum of the masses of the energy equivalent of this mass difference is the?
A. lost energy B. work function C. binding energy D. stability energy Correct Answer: Option C – binding energy
The major difference between a pure semiconductor and a pure metal is that?
A. metals are harder than the semiconductor B. while the resistance of metals decreases with temperature, the reverse is the case for semiconductor C. the resistance of metals increases with temperature, while for semiconductors, it is the reverse D. metals have...
In a semi conductor junction diode; as the depletion or barrier layer is forward-biased, the layer?
A. widens B. narrows C. remains constant D. widens then narrows Correct Answer: Option C – remains constantProducts
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