66
Q:

# Pieces of camphor placed on water move about rapidly. This is because of

 A) diffusion B) viscosity C) surface tension D) capillarity

Answer:   C) surface tension

Explanation:

The Camphor slowly dissolves in the water lowering the latter's surface tension in the immediate neighbourhood. The stronger pull exerted by the uncontaminated portion of water brings about a movement of the surface and the camphor particles are carried along with it. When after sometime the whole surface settles for the reduced tension, the movement of the camphor too short.

Subject: Physics
Q:

What is the noise level of normal conversation?

 A) About 60 dB B) About 70 dB C) About 80 dB D) About 90 dB

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 649
Q:

As an object falls freely its ___________________.

 A) kinetic energy gets converted into potential energy B) potential energy gets converted into kinetic energy C) momentum gets converted into gravitational force D) gravitational force gets converted into momentum

Answer & Explanation Answer: B) potential energy gets converted into kinetic energy

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 26194
Q:

Due to an acceleration of 1  $m/s2$, the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in  that period.

 A) 125 B) 37.5 C) 62.5 D) 75

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 805
Q:

What is measured with the Nephometer?

 A) volume of rainfall B) Cloud volume and speed C) Salinity of Sea D) All options are correct.

Answer & Explanation Answer: B) Cloud volume and speed

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

1 10282
Q:

What is the standard room temperature in Kelvin?

 A) 98 K B) 198 K C) 273 K D) 373 K

Answer & Explanation Answer: A) 98 K

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 10860
Q:

An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

 A) 16 m/s B) 8 m/s C) 32 m/s D) 4 m/s

Answer & Explanation Answer: C) 32 m/s

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

1 642
Q:

1 watt is equal to 1 ____________

 A) J s-1 B) J s C) J s-2 D) J

Answer & Explanation Answer: A) J s-1

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

2 12857
Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 A)  25 B)  37.5 C)  50 D)  75