The linear expansivity of brass is 2 x 10-5C-1. If the volume of a piece of brass is 15.00cm3 at 00C, What is the volume at 100oC?
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1998
In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is
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1998
A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is
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1998
In a closed organ pipe producing a musical note, an antinode will always be produced at
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1998
The physical properties of sound waves can best be described by
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1998
One valid assumption of the kinetic theory of gasses is the
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1998
A man wears convex lens glasses of focal length 40cm in order to correct his eye defect. instead of the optimum 25cm, his least distance of distinct vision is
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1998
The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is
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1998
The most suitable type of mirror used for the construction of the search light is the
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1998
An object is placed in front of two plane mirrors inclined at an angle of 0o. If the total number of images formed is 7, Find the value of \(\theta\)
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1998
An object 0 lies at a distance m in front of concave mirror of focal length f. If m < f, then the final image obtained will be
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1998
Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts
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1998
Which of the following can be used to reduce local action in a Laclanche cell?
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1998
An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because
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1998
The force of repulsion between two point positive charges 5\(\mu\)C and 8\(\mu\)C separated at a distance of 0.02 map art is. [\(\frac{1}{4{\pi}{\varepsilon}_o}\) = 9 x 109Nm2C-2]
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1998
Which of the following are true about the infra-red radiation? i. it is invisible ii. it is called heat ray iii. its frequency is higher than that of blue light iv. it travels as a transverse wave
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1998
The electrochemical equivalent of a metal is 1.3 x 10-7kgC-1. The mass of the metal which 2.0 x 104C of electricity will deposit from a suitable electrolyte is
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1998
A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil.
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1998
Electricity is supplied to a school along a cable of total resistance 0.5\(\Omega\) with the maximum current drawn from the mains as 100A. The maximum energy dissipated as heat for 1 hr is
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1998
The iron core of an induction coil is made from bundles of wire so as to