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Q:

1 kW = ?

A) 1000 W B) 10 W
C) 100 W D) 10000 W
 
Answer & Explanation Answer: A) 1000 W

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Q:

The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

A) 20 cm B) 5 cm
C) 10 cm D) 15 cm
 
Answer & Explanation Answer: C) 10 cm

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Q:

Why boiling point of water decreases at high altitudes?

A) Because of high temperature B) Because of low atmospheric pressure
C) Because of low temperature D) Because of high atmospheric pressure
 
Answer & Explanation Answer: B) Because of low atmospheric pressure

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Q:

Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?

A) 1 diopters B) -9 diopters
C) 9 diopters D) -1 diopters
 
Answer & Explanation Answer: C) 9 diopters

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Q:

Who proposed Continental drift theory?

A) Alfred Wegener B) Alfred Worwick
C) Alfred Hanks D) Alfred Mane
 
Answer & Explanation Answer: A) Alfred Wegener

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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

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Q:

Pressure is measured in terms of

A) Mass & Density B) Work done
C) Force and Area D) Force and Distance
 
Answer & Explanation Answer: C) Force and Area

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Q:

If the angle of incidence formed on a concave mirror at a point is 30 deg then the angle of reflection will be

A) 15 deg B) 30 deg
C) 60 deg D) 90 deg
 
Answer & Explanation Answer: B) 30 deg

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