4
Q:

# Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted.

 A) rough white B) rough black C) shining white D) shining black

Explanation:

Black  surfaces are good emitters of heat ( They are also good absorbers of heat). If the black surface is rough too, the emitting will be better. So (b) is the correct answer. Shining surfaces reflect back radiation. So if the black surface is also shining the effectiveness of emitting heat is lessened.

Subject: Physics
Q:

0 deg K is equivalent to

 A) 273 deg C B) -273 deg C C) 0 deg C D) 100 deg C

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 57
Q:

The component used for tuning a radio is basically a variable ___.

 A) Resistor B) Condenser C) Inductor D) Transformer

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

0 41
Q:

The Beaufort scale is used to measure

 A) Atmospheric pressure B) Altitudes of mountains C) Wind velocity D) Intensity of earthquakes

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 30
Q:

What is the name of the phenomena (driven by the scattering of light) in which mountain tops acquire a rosy or orange hue around sunrise and sunset?

 A) Brillouin scattering B) Circle of confusion C) Alpenglow D) Barrel distortion

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

1 183
Q:

What is the name of the phenomena in physics and astronomy which involves the splitting of a spectral line into two or morecomponents of slightly different frequency when the light source is placed in a magnetic field?

 A) Lumen Effect B) Alpenglow Effect C) Zeeman Effect D) Raman Effect

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

2 136
Q:

The product of mass and velocity is called:

 A) Potential energy B) Momentum C) Force D) Kinetic energy

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

1 1161
Q:

Complete the following.
1 kwh = ..........?

 A) 36 × 10-6 J B) 3.6 × 10-6 J C) 3.6 × 106 J D) 36 × 106 J

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 1044
Q:

A body is falling from a height of 200 m. After it has fallen 100 m, the body will possess:

 A) less kinetic energy and more potential energy. B) Zero potential energy and half Kinetic energy C) more kinetic energy and less potential energy. D) half potential energy and half kinetic energy.

Answer & Explanation Answer: D) half potential energy and half kinetic energy.

Explanation: