Q:

Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s.

A) 0.01	B) 2500
C) 0.02	D) 1250

Answer & Explanation Answer: A) 0.01

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Q:

The sensation of sound persists in the human brain for about:

A) 0.5 sec	B) 0.2 sec
C) 0.1 sec	D) 1 sec

Answer & Explanation Answer: C) 0.1 sec

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Q:

Which is the brightest star in our night sky?

A) Canopus	B) Sirius A
C) Vega	D) Spica

Answer & Explanation Answer: B) Sirius A

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Q:

Which country, in January 2018 broke India's monopoly in providing Internet access to Nepal by becoming country's second Internet service provider?

A) South Korea	B) China
C) Japan	D) Indonesia

Answer & Explanation Answer: B) China

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Q:

What is the Centre of Curvature of a spherical mirror?

A) It is the centre of a hollow sphere of which the spherical mirror is a part	B) It is the midpoint of a spherical mirror
C) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection	D) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror

Answer & Explanation Answer: A) It is the centre of a hollow sphere of which the spherical mirror is a part

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Q:

If a body is whirled in a circle, then the work done on it ___.

A) is zero	B) is positive
C) cannot be determined	D) is negative

Answer & Explanation Answer: A) is zero

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Q:

Knife is an example for

A) Lever	B) Wedge
C) Inclined plane	D) Pulley

Answer & Explanation Answer: B) Wedge

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Q:

Prohibition of discrimination on grounds of religion, race, caste, sex or place of birth comes under which category of Fundamental Rights in Indian Constitution?

A) Right to Freedom	B) Right to Constitutional Remedies
C) Right to Equality	D) Right to Freedom of Religion

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