NDA Physics 2012/2013 Past Questions

Which of the following statements is/are true of the law of universal gravitation?

The turning effect of a force about an axis is:

A rigid body under the action of a number of co-planar forces is in equilibrium if:
I. The resultant force is zero
II. The algebraic sum of the moment of the forces about any axis is zero
III. The resultant force is less than one

Which of the following statements is/are correct about a couple?

The unit of moment is ____.

Centripetal force can be worked out with the relationship

Angular velocity is measured in

A car goes around a bend, what provides the centripetal force?

A girl of mass 30kg is on a roundabout of radius 5 m that makes one complete turn every 5 seconds, what is the centripetal force acting on her?

The frequency of the oscillation is defined as ___.

Supreme FM Kaduna transmits at a frequency of 96.1 MHz. if speed of radio waves is 3 x 10⁸m/s, what is the wavelength?

The equation for a transverse wave moving along a long string is y = 6.0 sin(0.020 x 4.0t). Calculate the amplitude.

Arrange the following electromagnetic waves in order of increasing wavelength

A progressive wave is given by y = 5 Sin(50 t - x) cm .Find the wave length

Standing waves are produced in a rubber tube 12 m long. If the tube vibrates in five segments and the velocity of the waves is 2m/s. What is the frequency of the wave?

A metre rule weighing 1N is pivoted on a knife edge at the 30 cm mark. If a 3 N weight is hung from the 10 cm mark, then to balance the rule, a 4 N weight must be hung at the ___.

If air resistance is ignored, a stone dropped from the top of a 20m building will hit the ground after about ____.

Jack observed that his grandfather's clock is losing time. To adjust the clock so that it will keep the correct time ___.

Which one of the following does not depend on how large or how small a sample of material you have?

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

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

Which of the following is a vector?

An electromagnetic wave has velocity of 3 x 10⁸ m/s² and frequency of 3 x 10⁶ Hz. What is the wavelength?

If the distance between a node and the neighbouring anti-node of a stationary wave is 20m, what is the wavelength of the wave?

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

An object is placed 12 cm from a convex lens. The image formed is 12 cm from the lens. Compute the magnification.

A heater is rated 10 A. 250 W. What is its resistance?

Two transformers are identical, except that the First has a solid iron core, while the second has a laminated iron core. What is the major disadvantage of the first when compared with the second?

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

The leclanche cell contains a positive terminal made of carbon, the negative terminal is made of what material?

In the figure above, MN is a light uniform metre rule pivoted at 0, the 80 cm mark. A load of mass 3.0kg is suspended on the rule at L, the 10cm mark. If the rule is kept in equilibrium by a string RP, fixed at P and attached to the rule at R, the 20cm mark. then the tension T in the string is ___.

A 0.05 kg bullet travelling at 500 ms^-1 horizontally strikes a thick wall. It stops after penetrating through the wall at horizontal distance of 0.25m. What is the magnitude of the average force the wall exerts on the bullet?

A force of 100 N stretches an elastic string to a total length of 20 cm. If an additional force of 100 N stretches the string 5 cm further, find the natural length of the string.

Two divers, G and H, are at depths 20 m and 40 m respectively below the water surface in lake. The pressure on G is P1 while the pressure on H is P2 if the atmospheric pressure is equivalent to 10 m of water, then the value of P2/P1 is

The areas of the effort and load pistons of a hydraulic press arc 0.5 m² and 5 m² respectively. If force F1 of 100 N is applied on the effort piston, the force F2 on the load is ___.

Which of the following is a characteristic of stationary waves?

To produce an enlarged and erect image with a concave mirror, the object must be positioned ___.

The property that is propagated in a travelling wave is ___.

Which of the following eye defects can be corrected using a cylindrical lens?

The time rate of loss of heat by a body is proportional to the ___.