Physics Questions

Q:

Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?

A) -3.75 diopters B) -11.25 diopters
C) 3.75 diopters D) 11.25 diopters
 
Answer & Explanation Answer: D) 11.25 diopters

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Q:

What is the SI unit of temperature?

A) Kelvin B) Joule
C) Celsius D) Fahrenheit
 
Answer & Explanation Answer: A) Kelvin

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Q:

If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object __________.

A) increases B) stops
C) decreases D) no effect
 
Answer & Explanation Answer: C) decreases

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Q:

During which of the following operating conditions of an automobile, carbon monoxide content in exhaust gas is maximum?

A) Acceleration B) Cruising
C) Idle running D) Deacceleration
 
Answer & Explanation Answer: C) Idle running

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Q:

Farad is unit of ___________.

A) Capacitance B) Reactance
C) Electric charge D) Electric conductance
 
Answer & Explanation Answer: A) Capacitance

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Q:

What is the viscosity of an ideal fluid?

A) Equal to its mass B) Equal to its weight
C) Zero D) One
 
Answer & Explanation Answer: C) Zero

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Q:

Which one of the following statements with regard   to   Jet   stream,   an   upper   level tropospheric wave, is not correct?

A) It is narrow band of high-velocity wind. B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.
C) Jet  streams  are typically  continuous over long distances. D) In summer, the polar front jet achieves its maximum force.
 
Answer & Explanation Answer: B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.

Explanation:

All  are  correct  except  D,  as  Jet streams  are  phenomena  of  winter. It   is   believed   that   jet   stream exercises  an  important  influence on the winter weather in India.

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Q:

How can we measure specific gravity of milk?

A) Using a viscometer B) Using an odometer
C) Using a hygrometer D) Using a hydrometer
 
Answer & Explanation Answer: D) Using a hydrometer

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