NDA Physics 2016/2017 Past Questions

A light-year is a unit of ___.

Which of the following pairs of physical qualities do not have the same dimension?

The ratio of minimum wavelengths of Lyman and Balmer series will be __.

Isotopes of an element contains ___.

When light is incident on a metal surface, the energies of the emitted electrons ___.

According to the uncertainty principle, it is impossible to precisely determine at the same time particle's ___.

When an atom absorbs a photon of light, which one or more of the following can occur?

According to the exclusion principle, no two electrons in an atom can have the same

What is the maximum wavelength the (in nm) of light required to produce any current via the photoelectric effect if the anode is made of copper, which has a work function of 4.7eV?

When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as __.

An electric iron of resistance 20Ω takes a current 5A. Calculate the heat in Joule developed in 30s.

An incident light ray in air strikes a plane glass surface at an angle of 25° to the normal. If the index of refraction of glass is 1.5, find the angle of reflection.

What is the critical angle for light passing from glass (n = 1.54) to water (n = 1.33)?

The apparent bending of a ruler when it is dipped into a beaker of water is due to

Calculate the speed of light in water. Assume the index of refraction of water is 1.33.

A student passed a light ray through a glass prism and obtained a value of 50° for the angle of minimum deviation. If the apex angle of the prism is 60°, calculate the index of refraction of the glass.

Which is correct for total internal reflection to occur?

Which of the following is not correct when light is passed through a triangular prism?

A concave mirror of focal length 10 cm forms an erect image. If the image is twice the size of the object, then the object is at what distance from the mirror?

In Coulomb's Law, the force between two-point charges is proportional to
(i). the square of the distance between them
(ii). the product of the charges
(iii). the permittivity of the medium

Which of the following factors affects the speed of sound in air?
(i) Temperature
(ii) Pressure
(iii) Frequency

The differences observed in solids, liquids and gasses may be accounted for by____

A 75N force inclined at angle 300 above the horizontal drags a 15kg mass a distance 4.5m along the horizontal floor. Calculate the work done by the force.

A horizontal force of 150N is applied to a 51 Kg carton on a level floor. The coefficient of static friction is 0.5 and that of sliding friction is 0.4. The frictional sliding force acting on the carton is? (g = 9.8m/s²)

A lorry of mass 2000kg moving at 36km/h is brought to rest over a distance of 20m. Calculate the average breaking force.

A particle of mass 5 x 10 kg^-4 revolves in a circle with a radial acceleration of 8 x 10⁵m/s². The centripetal force on the particle is ___.

A car starting from rest moves with a uniform acceleration of 5 m/s². The distance it covers in the fourth second of its motion is __.

A wheel of 0.4 m radius rotates on a stationary axle. It is uniformly speeded up from rest to a speed of 900 rpm in a time of 20s. Find the constant angular acceleration of the wheel

The stylus of a phonograph record exerts a force of 7.7 x 10^-2 N on a groove of record exerts a force of 7. N on a groove of radius 10x10^-5m.Compute the pressure exerted by the stylus on the groove.

A piece of stone attached to one end of a string is whirled round a horizontal circle and the string suddenly cuts. The stone will fly off in a direction __.

The figure below shows a charge, +Q, a distance 2d from a charge, —Q, and a point x at a distance d, from —Q.

The field strength at x is numerically

The three capacitors in the figure below store total energy in Joules of

In figure (a) below the time, the constant is 4 sec. The time constant in seconds in figure (b) is

Tungsten obeys Ohm's law because

A capacitor, C = 2μF, and an inductor, L= 10H, coil resistance, R = 5Ω are in series in a circuit when an alternating current of 2A r.m.s. flows. What is the value of the power in watts in the circuit?

In the circuit shown below, the power produced in the resistor, R, is one quarter that produced in the 3Ω resistor.

A current, I, in a lamp varies with voltage, V, as shown in the figure below:

The variation of power, P, with current, I, in the figure above is best shown by which graph

A 0.10 mA moving coil meter of 5 Ω resistance can be converted into a 0.2 A meter by a resistance R with the meter when

An induced emf is produced between the ends of a horizontal steel axle, X, of a train moving due east. This is because ___.

An alternating current, I, in amperes varies with time, 1, in seconds as I = 4sin200irt. The Entire value of the current, 1, in A and the frequency in Hz are: