This quiz consist of over 50 NDA Physics past questions and answers. The answers are well explained. Retake the quiz as many times as you feel the need. Success!

This is a timed quiz. You will be given 1200 seconds to answer all questions. Are you ready?

1200

#### Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm

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#### What is the speed of compressional waves (sound waves) in water? The bulk modulus for water is 2.2 x 10^{9}Nm^{2}. v = square-root of bulk modulus/density = square-root of 2.2 x 10^{9}Nm^{2}/1000kgm^{-3} = 1.48km/s

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#### Find the frequencies of the first three harmonics of piano string of length 1.5m. If the velocity of the waves on the string is 120m/s

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#### If a room is saturated with water vapour, the temperature of the room must be

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#### One type of eye defect called hyper metropia. A person can only see distant objects but not near objects. What type of lens should be used for this defect?

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#### The number of neutrons contained in the nucleus of 238U is

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#### How many nodes will be contained in the first evertone produced by blowing into close pipe?

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#### What is the combined resistance of two resistors, each resistor 20 ohms combined in parallel?

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#### Which of the following is the dimension of pressure

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#### A room is heated by means of a charcoal fire. An occupant of the room standing away from the fire is warmed mainly by

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#### What physical parameter dictates the resistance of the carbon particles used in carbon microphone?

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#### Which of the following devices may be used to convert AC to DC

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#### What happens to the relative density Of the acid when a lead-acid accumulator is charged?

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#### 200g of water at 90^{o}C is mixed with 100g of water at 30^{o}C. What is the final temperature?

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#### Which of the following quantities has the same unit as the watt?

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#### A body of mass 2kg moving vertically upwards has its velocity from 10m/s to 40m/s in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.

(g = 10m/s

Show hint
^{2}
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#### To convert a galvanometer into a voltmeter to read large voltages , one requires

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#### Determine the inductive reactance when a 30.0 mH inductor with a negligible resistance is connected to a 1.30 x 10^{3}Hz oscillator.

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#### What is the combined resistance of 6-ohms resistor which is connected in series with a parallel arrangement of two resistors, each resistor of 2-ohms?

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#### 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

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#### Which of the following is NOT an example of periodic motion?

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#### A plane sound wave of frequency 85Hz and velocity 342m/s is reflected from a nautical wall. At what distance from the wall does the wave have an antinode?

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#### The mass of a specific gravity bottle is 15.2g when it is empty. It is 27.2g when filled with kerosene and 24.8g when filled with distilled water. Calculate the relative density of kerosene.

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#### Which of the following graphs represents the variation of pressure against volume at constant temperature?

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#### Why would an electric bulb filled with air not be very satisfactory?

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#### When a coil is rotating between the poles of a horse-shoe magnet, the induced voltage is greatest when the axis of the coil is moving

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#### The current capacity of an accumulator is rated at 80 ampere-hour-(80Ah). How long is such an accumulator expected to give a current Of 20 ampere?

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#### A 5kg block is released from rest on a smooth plane inclined at an angle of the horizontal. What is the acceleration down the plane?

(g = 10m/s

Show hint
^{2})
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#### The length of a displaced pendulum bob which passes its lowest point twice every second is

(g = 10m/s

Show hint
^{2}
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#### An object of mass 100g projected vertically upward from the ground level has a velocity of 20mls at a height of 10m. Calculate its initial kinetic energy at the ground level. (g = mls^{2} neglect air resistant)

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#### A body is projected from the earth's surface with the intention of letting it escape from earth's gravitational field. What is the minimum escape velocity of the body? (Earth's radius = 6.4 x 10 ^{3}km)

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#### The melting point of naphthalene is 78%. What is this temperature in Kelvin?

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#### What is the wave length of a wave having a frequency of 30Hz and moving with a velocity of 330m/s?

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#### The Bainbridge spectrometer is used to measure the

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#### A boat travels due east at a speed of 40mls across a river flowing due south at 30mls. What is the resultant speed of the boat?

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#### When the volume of a given mass of gas is halve and its temperature doubled the pressure

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#### Which of the following normally produces a virtual magnified image?

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#### When 100g of liquid L_{1} at 78^{o}C was mixed X_{2} of liquid L_{2} at 50^{o}C, the final temperature 60^{o}C. Given that the specific heat capacity of L_{2} is half that of L_{1}, find X

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NDA - Physics - 2003

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