NDA Physics 2013/2014 Past Questions

The moment of inertia of an object does not depend upon __.

The minimum number of pulleys in a block and tackle needed to achieve an M.A of 6 is __.

A horizontal force of 150N is applied to a 51Kg 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)

An arrow bears a certain bow with a speed of 30m/s. What is its maximum range?

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

Which one of the following is not used for the detection of radiation?

The half-life of a radioactive isotope may be increased by ___.

Which one of the following statements is true?

Millikan's oil drop experiment was designed to calculate the ___.

A rate meter connected to a Geiger-Muller tube gives a count rate of 2000 per minute when a radioactive source is placed nearby. If the half of the source is 30 minutes, then after 2 hours the count rate would be ___.

The charge on an electron is about ___.

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

If an object is placed in front of a diverging lens, the image formed will be

An opaque object is floating 3.5cm above the bottom of a body of water. but appears to be floating 5.0cm below the surface. If the light is 10.0cm deep its refractive index is __.

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

If a radio waves travel at a speed of 3 x 10⁵kms^-1, then the wave length of a radio wave of frequency 1.5MHz is ___.

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

In Fig. l the potential at x due to the charges at + Q and -Q is

In Fig. 3(i) the time constant is 4s. The time constant in Fig.3(ii) is

An electrical heater supplies 320J in 1 minute to a 4Ω resistor. The steady current flowing in the resistor is about __.

The wire on a metre bridge is 100cm long. For the most accurate measurement of an unknown resistance, the balance point on the wire in cm should best be in the range of

A 50V D.C. motor has a coil of 0.1a At 30 rev.min^-1 the current flowing is 5.0A. When the current flowing is less than 5.0A, the number of rev/min is ___.

Tungsten obeys Ohms Law because ___.

When you sit in front of an open fire, you are warmed by ___.

Which of the following equations correctly relates a temperature F in degrees Fahrenheit and a corresponding temperature C in degree Celsius?

A 2m uniform conductor with resistivity P = 2x 10^-1 m conducts a current of 0.1 A when connected across a 6v battery. what is the cross-sectional area A of the conductor?

The specific latent heat of fusion of ice, is 340KJkg^-1 when 10kg of water freezes

A bimetallic strip bends when heated because the metals __.

Equal masses of Copper and Aluminium are to be placed in a beaker of water at 0°C. The Copper is initially at 50°c and the aluminium are 400Jkg^-1 k^-1 and 880Jkg^-1 k^-1 respectively, the final water temperature will be __.

On a sunny day, a driver parks his car with all the windows closed. When he returns to the car, he finds it is unbearably hot inside. This is mainly because the infra-red rays from the sun ___.

The melting point of naphthalene is 78°C. What is the temperature in Kelvin?

Which of the following is true of light and sound waves?

When the bottom tip of a vibrating tuning fork is held in contact with a wooding box a louder sound is heard. This phenomenon is known as ___.

The current capacity of an accumulator is ruled at 80 ampere-hours. How long is such an accumulator expected to give a current of 20 ampere?

Which of the following normally produces a virtual magnified image?

A plane sound wave of frequency 85.5Hz and velocity 342 ms^-1 is reflected from a nautical wall. At what distance from the wail does the wave have an anti-node

In a certain type of eye defect. the focal length of the cornea is different in various planes. Images in the planes are therefore focused at different points. What in this eye defect called?

What is the total charge produced in a circuit when a current of 4A flows for 2 minutes?

The Leclanche cell contains a positive terminal made of carbon: the negative terminal is made of what material?