Which of the following equations shows how how the linear expansivity (\(\alpha\)) and the cubic expansivity (\(\gamma\)) of a material are related?
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2011
Total internal reflection occurs in an optical prism when light rays
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2011
A ray undergoes a minimum deviation at 40o when it is incident on equilateral triangular glass prism. Calculate the refractive index of the prism
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2011
The image formed by a convex mirror is always
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2011
Which of the following statements about the image formed by a plane mirror is not correct?
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2011
Ether produces a cooling effect when it is poured on the hand because it has
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2011
Two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period
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2011
The focal length of the eye-piece of an astronomical telescope is f1, while the focal length of the object is f2. Fro normal adjustment, the angular magnification is given by
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2011
Presbyopia is a defect of the eye resulting from
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2011
An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance
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2011
The speed of light in a certain medium is V while its speed in a vacuum is C. The absolute refractive index of the medium is
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2011
When the pointed end of an uncharged optical pin is brought near the cap cf a positively charged electroscope, it is observed that the gold
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2011
The capacitance of a parallel-plate capacitor
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2011
The correct relationship between "G" and "g" in a gravitational field is given by the equation (Where the symbols have their usual meanings)
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2011
Which of the following statements about the electromagnetic waves is correct?
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2011
The main difference between echo and reverberation is that
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2011
A wire of length 30cm is moved with a speed of 2ms-1 at right angles to a magnetic field of flux density 0.4T. calculate the emf induced in the wire
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2011
The resistivity, \(\mathit{P}\), of a material of length l, cross-sectional area A, resistance R, is given by the equation
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2011
An ammeter with a full scale deflection of 10mA has an internal resistance 0.5\(\Omega\). calculate the resistance of the shunt required to adapt it to read up to 3A