General Science Physics MCQ-4

In case of moving source of sound approaching the observer

(A) Wavelength of sound appears to be more
(B) Wavelength of sound appears to be less
(C) The frequency appears to be less
(D) None of the above

Pressure at any point of a liquid Increases with

(A) density of the liquid
(B) acceleration due to gravity
(C) depth of the point from the free surface
(D) All of the above

The terminal velocity of a small sized spherical body of radius r falling in a viscous liquid is proportional to

(A) 1/r2
(B) l/ r
(C) r2
(D) r

Electromagnetic waves can travel through

(A) a medium such as air and water
(B) space where there are no electric and magnetic fields
(C) electric field or magnetic field
(D) Both (a) and (b)

Consider the following statements and select the correct code
1. Manometer is a device for measuring differences in pressure usually by noting the difference in the height of two liquid columns.
2. Sphygmomanometer is a device used to measure blood pressure.
Codes

(A) Only 1
(B) Only 2
(C) 1 and 2
(D) Neither 1 nor 2

A small and & large min drops are falling through air

(A) the small drop moves faster
(B) the large drop moves faster
(C) both moves with same speed
(D) None of the above

Who firstly demonstrated experimentally the existence of electromagnetic wave?

(A) Hertz
(B) Romar
(C) Marconi
(D) Maxwell

Which one of the following is used by the mountaineers and the pilots to measure pressure?

(A) Simple barometer
(B) Fortin barometer
(C) Manometer
(D) Aneroid barometer

A small drop fails from rest from a large height h in air the final velocity is

(A) almost independent of h
(B) directly proportional to h
(C) inversely proportional to h
(D) directly proportional to h2

The patient is asked to drink barium sulphate (BaSO 4) for examining the stomach by X-rays because X-rays are

(A) less absorbed by heavy atoms
(B) more absorbed by heavy atoms
(C) reflected by heavy atoms
(D) refracted by heavy atoms

A gradual increase in the barometric height indicates which one of the following?

(A) Coming of rain
(B) Coming of a storm
(C) Starting of cold weather
(D) Coming of fair weather

Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to a equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?

(A) Vessel B
(B) All the vessels A, 8 and C will be emptied simultaneously
(C) Vessel A
(D) Vessel C

MatchList I (Electromagnetic radiation) with List II (Approximate wavelength in metre) and select the correct answer using the codes given below the lists.
List I ————List II
A. Infrared radiation 1. 10 -12
B. X-rays 2. 10 -5
C. Ultraviolet radiation 3. 10 -10
D. Gamma rays 4. 10 -8
Codes
ABCD

(A) 2 3 4 1
(B) 1 4 3 2
(C) 1 3 4 2
(D) 2 4 3 1

Consider the following statements
1. Those substances, which expand on freezing, have their melting point lowered by the increase of pressure, where as those substances which contract on freezing have their melting points raised by the increase of pressure.
2. The phenomenon that ice melts on application of pressure and again solidifies when the pressure is released is known as regulation.
Which of the statement(s) given above is/are correct?

(A) Only 1
(B) Only 2
(C) Both 1 and 2
(D) Neither 1 nor 2

Dynamic lift is related to

(A) equation of continuity
(B) Pascal’s law
(C) Archimedes’ principle
(D) Bernoulli’s theorem

Which one of the following types of glass can cut of ultraviolet rays?

(A) Soda glass
(B) Crooked glass
(C) Pyrex glass
(D) Jena glass

Consider the following statements An external pressure p0 is applied to the surface of liquid in a container. Then,
1. The pressure on all side walls increase by p0
2. The pressure on the bottom wall increased by p0
3. The pressure at all points inside the liquid increases by p0
Which of the statement(s) given above is/are correct?

(A) 1, 2 and 3
(B) 1 and 2
(C) 1 and 3
(D) 2 and 3