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Q:

Which type of electromagnetic radiation has the shortest wavelength?

A) Gamma rays B) X-rays
C) Radio waves D) Infrared rays
 
Answer & Explanation Answer: A) Gamma rays

Explanation:

The order of wavelengths of electromagnetic spectrum is as follows ::

(Shortest to Longest) - Gamma, X-Rays, UV, Visible, Infrared, Microwaves, Radio Waves.

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Q:

A solar eclipse occurs when

A) moon comes in the middle of sun and earth B) sun comes in the middle of moon and earth
C) earth comes in the middle of moon and sun D) All of the above
 
Answer & Explanation Answer: A) moon comes in the middle of sun and earth

Explanation:

A solar eclipse happens when the moon gets in the way of the sun's light and casts its shadow on Earth. Solar eclipses happen when the New Moon comes between the Sun and Earth and blocks out the Sun's rays.

 

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Q:

With reference to gravity, what is G called?

A) Gravitational constant B) Gravitational attraction
C) Gravitational force D) Acceleration due to gravity
 
Answer & Explanation Answer: A) Gravitational constant

Explanation:
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Q:

Blood pressure is measured by _______.

A) Barometer B) Sphygmomanometer
C) Hydrometer D) Thermometer
 
Answer & Explanation Answer: B) Sphygmomanometer

Explanation:
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Q:

Work done by a passenger standing on a platform holding a suitcase weighing 10kg is

A) 980 J B) 98 J
C) 0 J D) 100 J
 
Answer & Explanation Answer: C) 0 J

Explanation:
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Q:

The given symbol stands for a/an ___ in an electric circuit.

A) resistor B) plug key
C) electric bulb D) battery
 
Answer & Explanation Answer: C) electric bulb

Explanation:
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Q:

A Sonar of a ship sends sounds waves of speed 1500 m/s. These waves are reflected back by the ocean floor in 5 seconds. Find the depth (in m) of the ocean floor.

A) 3750 B) 7500
C) 1875 D) 5000
 
Answer & Explanation Answer: A) 3750

Explanation:
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Q:

If a body takes 't' seconds to go once round the circular path of radius 'r', the velocity 'v' is given by

A) v=t2πr B) v=2πrt
C) v=2πr2t D) v=πr2t
 
Answer & Explanation Answer: B) v=2πrt

Explanation:
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