Q:

If the radius of the earth decreases and its mass remains the same, then the value of "acceleration due to gravity" will _____ .

A) decrease	B) increase
C) remain the same	D) become zero

Answer & Explanation Answer: B) increase

Explanation:

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Q:

___________________states that the induced e.m.f. is directly proportional to the rate of change of magnetic flux linkage or rate of cutting of magnetic flux
linkage.

A) Lenz's Law	B) Hooke's Law
C) Ohm's Law	D) Faraday's Law

Answer & Explanation Answer: D) Faraday's Law

Explanation:

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Q:

A current I flows through a resistor. A source maintains a potential difference of V across the resistor. The energy supplied by the source in time t is

A) V I t2	B) V I
C) V I t	D) V I/t

Answer & Explanation Answer: C) V I t

Explanation:

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Q:

What does BOD5 refer to?

A) Biochemical Oxygen Demand in 5 days	B) Biochemical Oxygen Demand in 5 hours
C) Biochemical Oxygen Demand in 5 minutes	D) Biochemical Oxygen Demand in 5 Months

Answer & Explanation Answer: A) Biochemical Oxygen Demand in 5 days

Explanation:

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Q:

Which of the following causes fly ash?

A) Hydroelectric Power Station	B) Coal Combustion Power Plant
C) Nuclear Power Plant	D) Tidal Power Plant

Answer & Explanation Answer: B) Coal Combustion Power Plant

Explanation:

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Q:

Super cooling stands for cooling of a liquid :

A) at freezing point	B) below freezing point
C) at melting point	D) above melting point

Answer & Explanation Answer: B) below freezing point

Explanation:

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Q:

SMOG is a combination of

A) Air and water vapour	B) Water and smoke
C) Fire and water	D) Smoke and fog

Answer & Explanation Answer: D) Smoke and fog

Explanation:

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Q:

In case State emergency is declared, it needs Parliamentary approval after every _____.

A) 6 months	B) 3 months
C) 1 year	D) 2 years

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