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Physics Study Material बिभाग ‘घ’| Mechanics and Properties Matter | Heat | Wave Motion | Electromagnetic Radiation | Light | Sound | Magnetism | Static Electricity | Current Electricity | Atomic Physics | Nuclear Physics | Astronomy and Space | Computer Science | General Etc.

Physics Study Material बिभाग ‘घ’ Shared By R. Agarwal

Physics Study Material बिभाग ‘घ’ on mahasarkar.co.in. This is the page where we are deal with Physics Study Material For Maharashtra Recruitment Exam. Every questions come from various source i.e. Mechanics and Properties Matter; Heat; Wave Motion; Electromagnetic Radiation; Light; Sound; Magnetism; Static Electricity; Current Electricity; Atomic Physics; Nuclear Physics; Astronomy and Space; Computer Science; and General. यह पेज ओह सब स्टूडेंट के लिए है, जो नौकरी की तलाश में हैं और भारती परिक्षा दिने के लिए इच्छुक हैं।

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Study Material: Physics बिभाग ‘घ’

  1. In Newtin’s third law, the action and reaction forces

(1) Act on different bodies

(2) Act on the same body

(3) are not always equal

(4) are always equal

Ans:- (2) Act on the same body

 

  1. As a spaceship moves from a higher to lower orbit, its speed

(1) Remains unchanged

(2) Decreases

(3) Increases

(4) Unpredictably changes

Ans:- (3) Increases

 

  1. The speed of an earth satellite moving in an orbit of radius r is

(1) Directly proportional to the square root of r

(2) Inversely proportional to the square root of r

(3) Does not depend on r

(4) Inversely proportional to r

Ans:- (2) Inversely proportional to the square root of r

 

  1. An astronaut on a space walk changes his direction

(1) By moving his limbs in the opposite direction

(2) By moving his limbs in the same direction

(3) By using a hand rocket

(4) By remote control from within the ship

Ans:- (3) By using a hand rocket

 

  1. The self-maneuvering unit by an astronaut works on Newton’s

(1) First law of motion

(2) Second law of motion

(3) Third law of motion

(4) Law of gravitation

Ans:- (3) Third law of motion

 

  1. From the data—average radius of the earth (R), average density of the earth (d), average value of the acceleration due to gravity (g) and the universal gravitational constant G, one can find out the mass of the earth by using

(1) R and d only

(2) G and g only

(3) g, G and R

(4) R and G only

Choose the correct answer from the correct answer using the codes below

(1) 1 and 3

(2) 2 and 3

(3) 1 and 4

(4) 3 and 4

Ans:- (1) 1 and 3

 

  1. Kepler discovered that planets travel in orbits which are

(1) Hyperbolic

(2) Parabolic

(3) Elliptical

(4) Circular

Ans:- (3) Elliptical

 

  1. An aeroplane takes off from a runway at a uniform speed of 100 m/s. What length of the runway is required to achieve the speed if the aeroplane starting from rest moves with a uniform acceleration of 10 m/s2

(1) 200 m

(2) 250 m

(3) 500 m

(4) 1000 m

Ans:- (3) 500 m

 

  1. As water freezes, its temperature

(1) Decreases

(2) Does not change

(3) Increases

(4) Fluctuates

Ans:- (2) Does not change

 

10.Given below are two statements, one labeled as Assertion (A) and the other labeled as Reason (R); Assertion (A) : Pigs wallow in mud to cool themselves Reason (R) : Pigs have no sweat glands and therefore cannot cool themselves by the evaporation of perspiration

In the context of the above two statements which one of the following is correct?

(1) both A and R are true, and R explains A

(2) both A and R are true, but R does not explain A

(3) A is true, R is false

(4) A is false but R is true

Ans:- (1) both A and R are true, and R explains A

 

  1. The pupil of the eye adjusts automatically for

(1) Short distance vision

(2) Colour

(3) Amount of light

(4) Object size

Ans:- (3) Amount of light

 

  1. A fluorescent lamp and a television picture tube emit light by the phenomenon of fluorescence, which is caused by

(1) Ultraviolet rays in both the devices

(2) Beam of electrons in both the devices

(3) Beam of electrons in fluorescence, which is caused by

(4) Beam of electrons in television tube and ultraviolet rays in a fluorescent lamp

Ans:- (4) Beam of electrons in television tube and ultraviolet rays in a fluorescent lamp

 

  1. Compared to the velocity of light, the velocity of radio waves is

(1) smaller

(2) greater

(3) the same

(4) infinite

Ans:- (3) the same

 

  1. Ultrasonic’s is used for

(1) Locating underwater objects and finding their depth

(2) Diagnosing abnormalities or diseases in human organs such as liver, pancreas, kidneys, heart.

(3) Mapping underground structures for oil and mineral deposits

(4) All the above mentioned purposes

Ans:- (4) All the above mentioned purposes

 

  1. A diagnostic technique commonly known as ‘Ultrasound’ is based on recording

(1) Echoes of extremely high frequency waves

(2) Echoes of extremely low frequency waves

(3) Ultraviolet rays

(4) Nuclear magnetic resonances

Ans:- (1) Echoes of extremely high frequency waves

 

 

  1. The frequency of a sound wave is related to its

(1) Amplitude

(2) Loudness

(3) Pitch

(4) Quality

Ans:- (3) Pitch

 

  1. In electric circuits, miniature circuit breakers (MCB) are preferred over fuses because

(1) An MCB permits overloading in a circuit without causing a fire

(2) An MCB is cheaper than a fuse

(3) After removing the overload, the MCB can be reset very easily by pressing a lever

(4) Fuses of the correct current rating are not available

Ans:- (3) After removing the overload, the MCB can be reset very easily by pressing a lever

 

  1. An electron microscope can be used for viewing

(1) Electrons and other elementary particles

(2) Structure of bacteria and viruses

(3) Inside of the human stomach

(4) Inside of the human eye

Ans:- (2) Structure of bacteria and viruses

 

  1. In uranium-235, fission occurs when it captures

(1) A fast proton

(2) A fast neutron

(3) A slow neutron

(4) A photon

Ans:- (3) A slow neutron

 

  1. Hydrogen bomb is based on the principle of

(1) Controlled fission reaction

(2) Uncontrolled fission reaction

(3) Controlled fusion reaction

(4) Uncontrolled fusion reaction

Ans:- (4) Uncontrolled fusion reaction

 

  1. A positron is an elementary particle

(1) Having mass equal to that of an electron

(2) With a charge equal and opposite to that of an electron

(3) With a charge equal to that of a proton

(4) Having mass equal to that f a proton

Choose the correct answer from the codes given below.

Codes:

(1) 1 and 2 only

(2) 1, 2 and 3 only

(3) 2 and 3 only

(4) 1 and 3 only

Ans:- (2) 1, 2 and 3 only

 

  1. Radioactivity is a property of

(1) Atomic nuclei

(2) Excited electrons

(3) X-rays

(4) Ultraviolet light

Ans:- (1) Atomic nuclei

 

  1. During the total solar eclipse of the sun in October ’95, Indian scientists performed experiments to measure accurately the

(1) Distance of the sun from the earth

(2) Period of rotation of the sun

(3) Diameter of the sun

(4) Distance of the sun

Ans:- (3) Diameter of the sun

 

  1. As a metal brick, thrown into a deep lake, sinks deeper and deeper, the buoyant force acting on it

(1) Increases

(2) Decreases

(3) Vanishes at a particular depth

(4) Remains constant

Ans:- (4) Remains constant

 

  1. Butter floats in droplets on the surface of a hot soup. But when the soup cools, the droplets spread out to form a thin layer on the surface. The happens because

(1) Butter is less dense than the soup

(2) Butter is more viscous than the soup

(3) Surface tension of the soup increases on cooling

(4) Butter forms an insulation layer to slow down cooling

Ans:- (3) Surface tension of the soup increases on cooling

 

  1. On the moon, an astronaut cannot drink lemonade with the help of a straw because

(1) Acceleration due to gravity on the moon is less

(2) There is no atmosphere on the moon

(3) Lemonade evaporates instantaneously on the moon

(4) None of the above

Ans:- (2) There is no atmosphere on the moon

 

  1. A remote control gadget (for TV etc.) has in it

(1) A small electromagnet, that emits electromagnetic waves

(2) A small oscillator that emits electric pulses

(3) A small transmitter that emits infrared signals

(4) None of these

Ans:- (3) A small transmitter that emits infrared signals

 

  1. A body would weight more at the poles than at the equator because

(1) Equatorial radius is greater than polar radius

(2) The earth rotates about its axis

(3) The poles are covered with thick snow

(4) Polar radius is greater than equatorial radius

(1) A and B are correct

(2) B and D are correct

(3) A is correct

(4) A, B and C are correct

Ans:- (1) A and B are correct

 

  1. A stone tied at the end of a string is whirled in a circular orbit. If the length of the string and the velocity of the stone are both doubled, the tension in the string

(1) Is also doubled

(2) Becomes four times

(3) is halved

(4) Remains unchanged

Ans:- (1) Is also doubled

 

  1. A rocket and a jet engine differ because

(1) Their working principle are entirely different

(2) A rocket uses only liquid fuels whereas a jet can use solid fuels as well

(3) While a rocket carries its own oxygen supply a jet draws its air out if the atmosphere

(4) A rocket can propel vehicles into outer space whereas a jet cannot

(1) B, C and D are correct

(2) C and D are correct

(3) A and B are correct

(4) A, C and D correct

Ans:- (2) C and D are correct

  1. Assertion: Cooling inside a refrigerator is not proper when a thick layer of ice deposits on the freezer Reason: Ice is a bad conductor of heat

(1) Both A and R are correct and R explain A

(2) Both A and R are correct, but R does not explain A

(3) A is right and R is wrong

(4) A and R are both wrong

Ans:- (1) Both A and R are correct and R explain A

  1. Water is a highly effective coolant for a car engine because

(1) Water is a good conductor of heat

(2) Water has very high specific heat capacity

(3) Water boils at a comparatively high temperature

(4) Evaporation of water produces lot of cooling

Ans:- (2) Water has very high specific heat capacity

  1. An 80 kg man, a 40 kg woman and a 20 kg girl skydive simultaneously. If their parachutes are identical, then

(1) The girl will land first of all

(2) The woman will land first of all

(3) The man will land first of all

(4) All three will land simultaneously

Ans:- (3) The man will land first of all

  1. Consider the following statements: The critical velocity of an object falling in a viscous medium depends on

(1) The coefficient of viscosity of the medium

(2) The weight of the object

(3) The size of the object

Of these statements

(1) Only 1 is correct

(2) Only 1 and 2 are correct

(3) Only 2 and 3 are correct

(4) 1, 2 and 3 are correct

Ans:- (4) 1, 2 and 3 are correct

  1. The failure of light to travel strictly in a straight line is known as

(1) Dispersion

(2) Polarisation

(3) Refraction

(4) Diffraction

Ans:- (4) Diffraction

  1. Consider the following statements:

Doppler effect is applied to find out

(1) Whether a star is approaching earth or receding away from it.

(2) The speed of rotation of the sun

(3) The density of a star

Of these statements

(1) only 1 is correct

(2) only 1 and 2 are correct

(3) All three are correct

(4) none is correct

Ans:- (2) only 1 and 2 are correct

  1. The internal circuits of a computer are capable of representing all information using two elementary symbols: 1& O. These symbols are called

(1) Bytes

(2) Bits

(3) MIPS

(4) None of the above

Ans:- (2) Bits

  1. 1 KB (kilobyte) and 1 MB (megabyte) are respectively equal to

(1) 1024 bytes and 1000 kilobytes

(2) 1000 bytes and 10000 bytes

(3) 1000 bytes and 10000 bytes

(4) 1024 bytes and 100 kilobytes

Ans:- (1) 1024 bytes and 1000 kilobytes

  1. A computer’s ‘clock-speed’ is measured in

(1) Megabytes and gigabytes

(2) Nanoseconds and gigabytes

(3) Bits and megabits

(4) Megahertz and gigahertz

Ans:- (4) Megahertz and gigahertz

  1. The computer performs all mathematical and logical operations inside its

(1) Central Processing Unit

(2) Memory Unit

(3) Output Unit

(4) Visual Display Unit

Ans:- (1) Central Processing Unit

  1. The term ‘RAM’ stands for

(1) Random Awareness Memory

(2) Read all Memory

(3) Read Any memory

(4) Random Access Memory

Ans:- (4) Random Access Memory

  1. Which of the following are example of input devices?

(1) Visual display unit, dot matrix printer, laser printer

(2) Keyboard, mouse, optical mark reader

(3) Arithmetic and logic unit, control unit

(4) RAM, ROM, PROM

Ans:- (2) Keyboard, mouse, optical mark reader

  1. The term ‘program’ refers to

(1) A sequence of instructions

(2) The computer’s internal design

(3) Any information stored in the memory

(4) Any information processed by the computer

Ans:- (1) A sequence of instructions

  1. C, C++, JAVA are the examples of

(1) Commercial computer brands

(2) A computers internal parts

(3) Programming languages

(4) Types of secondary memory devices

Ans:- (3) Programming languages

  1. UNIX, DOS, Windows are examples of

(1) Application programs

(2) Operating systems

(3) Word processors

(4) word processors

Ans:- (2) Operating systems

  1. Multimedia devices enable the use of computers for

(1) Automation

(2) Defense use

(3) Entertainment

(4) Medical use

Ans:- (3) Entertainment

  1. The operation of adding two numbers is done in the

(1) Program

(2) ALU

(3) Control unit

(4) output unit

Ans:- (2) ALU

  1. Registers are high speed memory elements, situated in the

(1) Memory

(2) CPU

(3) 1/0 Unit

(4) ROM or EPROM

Ans:- (2) CPU

  1. TCP/IP is necessary if one is to connect to the,

(1) Phone lines

(2) LAN

(3) Internet

(4) A server

Ans:- (3) Internet

  1. http://www.examination.com is an example of

(1) URL

(2) HTML

(3) XML

(4) LAN

Ans:- (2) HTML

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