Q:

Choose the most appropriate answer:In which atmospheric layer are the communication satellites located?

A) Stratosphere	B) Ionosphere
C) Troposphere	D) Mesosphere

Answer & Explanation Answer: B) Ionosphere

Explanation:

The communication satellites are located in Ionosphere.

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Q:

A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

A) The wavelength of X-ray photon is less than the wavelength of visible radiation photon.	B) Both the photons have different energies.
C) The speeds of both the photons in vacuum are different	D) The frequency of X-ray photon is higher than the frequency of visible radiation photon.

Answer & Explanation Answer: C) The speeds of both the photons in vacuum are different

Explanation:

The speed of all the electromagnetic radiation are always same and equal to the numerical value 3 x 10^8m/sec.

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Q:

What is the unit of electric resistance?

A) Dyne	B) Pascal
C) Joule	D) Ohms

Answer & Explanation Answer: D) Ohms

Explanation:

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Q:

A broadcasting station transmits waves with a frequency of $71 x 10^{4}$ Hz and a speed of $3 x 10^{8}$ m/s. The wavelength of the wave is

A) 324.6 m	B) 422.5 m
C) 208.4 m	D) 418.8 m

Answer & Explanation Answer: B) 422.5 m

Explanation:

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Q:

Who among the following has not scored even a single triple hundred in test matches?

A) Brian Lara	B) Virender Sehwag
C) Sachin Tendulkar	D) Chris Gayle

Answer & Explanation Answer: C) Sachin Tendulkar

Explanation:

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Filed Under: Sports
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Q:

The Patkai hills belong to which mountain ranges?

A) Himachal	B) Hindu Kush
C) Purvanchal	D) Himgiri

Answer & Explanation Answer: C) Purvanchal

Explanation:

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Filed Under: Indian History
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Q:

Who invented the waterproof raincoat?

A) Robert Hooke	B) Cai Lun
C) Charles Macintosh	D) William Harvey

Answer & Explanation Answer: C) Charles Macintosh

Explanation:

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Filed Under: Inventions
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Q:

Who invented Aerosol can?

A) Erik Rotheim	B) Erik Mathew
C) Erik Tim	D) Eric Flayer

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