Q:

The radius of curvature of a concave mirror is 30 cm. Following Cartesian Sign Convention, its focal length is expressed as

A) -30 cm	B) -15 cm
C) +30 cm	D) +15 cm

Answer & Explanation Answer: B) -15 cm

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Q:

In a hydrogen atom, an electron moves in an orbit of radius $5.0 x 10^{- 11}$ m with a speed of $2.2 x 10^{6}$ m/s. What is the equivalent current? (Electronic charge = $1.6 x 10^{- 19}$ C)

A) 0.112 mA	B) 112 mA
C) 11.2 mA	D) 1.12 mA

Answer & Explanation Answer: D) 1.12 mA

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Q:

Researchers from Columbia University Medical Centre in United States of America have converted which of the following into the world’s smallest data recorder?

A) Natural bacterial immune system	B) Magnetic tape
C) Viral snippet copies	D) No option is correct.

Answer & Explanation Answer: A) Natural bacterial immune system

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Q:

__________ acts as a shield absorbing ultraviolet radiation from the sun.

A) Chlorofluorocarbons	B) Stratosphere
C) Ozone hole	D) Greenhouse

Answer & Explanation Answer: B) Stratosphere

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Q:

When a Proclamation of Emergency is in operation,the right to move a Court for the enforcement of all Fundamental Rights remains suspended, except

A) Article 20 and Article 21	B) Article 21 and Article 22
C) Article 19 and Article 20	D) Article 15 and Article 16

Answer & Explanation Answer: A) Article 20 and Article 21

Explanation:

The right to protection in respect of conviction for offences (Article 20) and the right to life and personal liberty (Article 21) remain enforceable even during emergency.

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Q:

Which committee was set up to review the concept of the poverty line?

A) S Tendulkar Committee	B) Lakdawala Committee
C) Wanchoo Committee	D) Dutt Committee

Answer & Explanation Answer: A) S Tendulkar Committee

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Q:

The largest committee of Parliament of India is

A) Public Accounts Committee	B) Estimates Committee
C) Committee on Public Undertakings	D) Joint Parliamentary Committee

Answer & Explanation Answer: B) Estimates Committee

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Q:

If $a + b + c = 15 a n d \frac{1}{a} + \frac{1}{b} + \frac{1}{c} = \frac{71}{a b c},$ then the $a^{3} + b^{3} + c^{3} - 3 a b c$ is

A) 160	B) 180
C) 200	D) 220

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