The intensity level of sound A is 2 dB greater than that of B. How many times more intense is the sound A than sound B

1.  2

2.  10

3.  16

4.  64

4
Correct Answer :

10

Explanation :
No Explanation available for this question

A magnet makes 5 oscillations per minute in earth's magnetic field (H = 0.3Gauss). By what amount the field should be increased, so that the magnet may make 10 oscillations per minute

1.  3.6 Gauss

2.  1.2 Gauss

3.  0.9 Gauss

4.  0.3 Gauss

4
Correct Answer :

0.9 Gauss

Explanation :
No Explanation available for this question

A cylinder fitted with a position contains a gas at 400C for which the critical temperature is 310C. The increase of pressure by 100atmos will

1.  Liquify the gas

2.  Not liquify the gas

3.  Burst the cylinder

4.  Freeze the-gas

4
Correct Answer :

Not liquify the gas

Explanation :
No Explanation available for this question

An airplane is fitted with a camera containing a lens of 5cm. focal length. To take a snap of a 1km stretch of land on a 5cm film strip, the plane would fly at an approximate height of:

1.  1000m

2.  2000m

3.  3000m

4.  4000m

4
Correct Answer :

1000m

Explanation :
No Explanation available for this question

Radio waves from an antenna travel with the velocity of:

1.  Sound

2.  Light

3.  Ultra sonics

4.  Infrared rays

4
Correct Answer :

Light

Explanation :
No Explanation available for this question

The sun radiates energy at the rate of 3.6 x 1033ergs/sec. which is equivalent to an annihilation of mass at the rate of:

1.  12 x 1010kg/sec

2.  6.3 x 1023kg/sec

3.  4 x 1012kg/sec

4.  2.43 x 104kg/sec

4
Correct Answer :

4 x 1012kg/sec

Explanation :
No Explanation available for this question

Alpha rays emitted from a radioactive substance are:

1.  Negatively charged particles

2.  Ionized hydrogen nuclei

3.  Doubly ionized helium atoms

4.  Uncharged particles having the mass equal to proton

4
Correct Answer :

Doubly ionized helium atoms

Explanation :
No Explanation available for this question

The Mariner's Compass is provided with Gimbals arrangement so as to:

1.  Keep the needle always pointing at East.

2.  Keep the needle always horizontal

3.  Give a direct value of dip

4.  Give a direct reading of declination

4
Correct Answer :

Keep the needle always horizontal

Explanation :
No Explanation available for this question

A 60 watt incandescent lamp operates at 120 volts. How many electrons pass through the filament in every second

1.  3.1 x 1018

2.  1.6 x 1019

3.  8400

4.  7600

4
Correct Answer :

3.1 x 1018

Explanation :
No Explanation available for this question

As you back away from a vertical plane mirror, the size of your image will

1.  Increase

2.  Decrease

3.  Remain constant

4.  Appear to remain constant but actually decrease

4
Correct Answer :

Remain constant

Explanation :
No Explanation available for this question

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