NDA Physics 2010/2011 Past Questions

If 2kg of punch of specific heat capacity 1.7KJ/Kg°C temperature 5°C is poured into a 1kg glass punch bowl that is at 20°C. The final temperature of the punch is:

A ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated?

A Carnot engine turns heat into work:

An adiabatic process in a system is one in which:

When a light ray approaches glass-air interlace from the glass side, the critical angle of refraction is:

The pupil of the eye controls:

Longitudinal waves do not exhibit:

A pure musical torte causes a thin wooden panel to vibrate. This is an example of:

A hydrogen atom is in its ground state when its electron:

Dispersion is the term used to describe ____.

Power loss occurs in a transformer because of ____.

The amplitude of a simple harmonic oscillator is doubled which of the following is also doubled?

A piece of soft iron will always experience a translational force in ____.

The terminal of a moving-coil galvanometer is short-circuited. If the coil were oscillating at the time, it would ____.

A single rectangular coil of cross-sectional area A is placed with its plane vertical and two of its sides horizontal in a uniform horizontal magnetic field of flux B. When the coil carries a current I, the couple required to hold it with its plane at an angle to the direction of the field is directly proportional to ____.

The resistivity of aluminium is twice that or copper and its density one-third that of copper. The ratio of the resistance of aluminium to copper wires that have the same mass per unit length is ____.

Capacitors and inductors are useful in filter circuits because they store electric

A beam or electrons is projected at an angle into a uniform magnetic field in a vacuum. The path that the beam follows could be traced out on the surface

Neutrons may be slowed down by passing them through a moderator, A substance suitable for use as a moderator is ____.

If an electron of mass m and charge are accelerated across an x-ray tube by a P.D of V, they strike the target with a minimum speed v. given by the relation ____.

A 20m steel wire is stretched to 20.0m by the application of a force of 50N. What force should be applied to stretch the wire to become 20.05m within its elastic limits?

What is the pressure exerted by a boy weighing 80kg on the ground when he stands on his feet whose area is 200cm²?

A column of CuCl₂, solution of height 50 cm and a column of water 60 cm are supported by the same pressure. What is the relative density of CuCl₂ solution?

Which of the following best explains why a person suffers a severe burn when his skin is exposed to steam than when boiling water is poured onto his skin?

A 15m metallic rod expanded to 15.03m when heated from 10°C to 100°C. The linear expansivity of the metals is ___.

A given mass of gas has a pressure of 800Nm^-2 at a temperature of 47°C. If the temperature is reduced to 27°C with the volume remaining constant, the new pressure is

Which of the following properties is common to energy transfer by waves and by particles?

Which of the following prevents the escape of radiant heat from vacuum flask?

Which of the following is a reason why a pressure cooker is used for fast cooking?

When the wet bulb and dry bulb thermometers of the hygrometer shows almost the same reading, then we assume that:

A parachute attains a terminal velocity when

In a wheel and axle mechanism, the diameters of the wheel and axle are 40cm and 8cm respectively. Given that the machine is 80% efficient, what effort is required to lift a load of 100 N?

The tendon in a man's leg is 0.01 m long, if a force a 5N stretches the tendon by 2.0 x 10-5 m. calculate the strain on the muscle.

Which of these statements are correct for the pressure in liquids?
I. Pressure in a liquid at a point acts equally in all directions
II. Pressure increases with depth
III. Pressure at a depth depends on the shape of the container
IV. Pressure at the same depth in different liquids are proportional to the densities of the liquids.

The atmospheric pressure due to water is 1.3 x 10⁶Nm^-2 What is the total pressure at the bottom of an ocean 10m deep?

A solid of weight 0.600 N is totally immersed in oil and water respectively. If the up thrust in oil is 0.210 N and the relative density of oil is 0.875. Find the up thrust in water

When you sit in front of an open fire you are warmed by a ____.

The linear expansivity of brass is 2 x 10^-5 C^-1. If the volume of a piece of brass is 15.00 cm³ at 0°C, what is the volume of 100°C?

A gas has a volume of 100cm³ at 270°C. If it is heated to temperature T unit a final volume of 120 cm³ is attained. Calculate T.

A 500W heater is used to heat 0.6kg of water from 25°C in t₁ seconds. If another 1000W heater is used to heat 0.2kg of water from 10°C to 100°C in t₂ seconds, find t₁/t₂