2
Q:

# The velocity required to place a vehicle in orbit round the moon is _______ that required to place it in orbit round the earth

 A) less than B) Greater than C) equal to D) greater than or equal to

Explanation:

This orbital velocity at the moon is less because orbital velocity = $rg$

where 'r ' is the orbital radius. i.e the distance of the body from the center of the earth and 'g' is the acceleration due to gravity on the body in question. In the case of the moon, both r and g are less than in the case of the earth.

Subject: Physics
Exam Prep: AIEEE , GATE
Q:

Which instrument is used to measure blood pressure?

 A) Sphygmomanometer B) Lactometer C) Thermometer D) Glucometer

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 14
Q:

The term ______ is prefixed to scientific terms to describe something that is constant.

 A) Photo B) Iso C) Mega D) Quasi

Explanation:

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0 76
Q:

1 horsepower = approximately _____ watts.

 A) 746 B) 764 C) 647 D) 674

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 141
Q:

Which law of physics states that the force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled?

 A) Coulomb’s Law B) Stefan's Law C) Pascal's Law D) Hooke's Law

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 256
Q:

What is the unit of measure of a magnetic field?

 A) Cobalt B) Ohm C) Tesla D) Ampere

Explanation:

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3 212
Q:

_______ expansion makes the Eiffel Tower taller during summers.

 A) Thermal B) Chemical C) Gravitational D) Gradient

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

3 1354
Q:

Georg Simon Ohm in whose honour we have the famous Ohm’s Law, hailed from which country?

 A) Russia B) Spain C) Poland D) Germany

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

1 1418
Q:

Purpose of an optical filter is to

 A) reflect lights of different colours B) dispense light into component colours C) refract light of different colours D) transmit or absorb light of different colours

Answer & Explanation Answer: D) transmit or absorb light of different colours

Explanation: