PHYSICS

 *PHYSICS* 

 *1).* Which of the following is an example of Electromagnetic 

wave?

A. Radio waves 

B. Heat waves 

C. Light waves

D.All

 *2).* In gases the type of progressive waves produced are:

A. Longitudinal waves

B. Transverse waves 

C. Both 

D.No waves are produced in gases 

 *3).* The waves transport which of the following in a medium?

A. Energy only

B. Mass and energy

C. Momentum and energy

D.Momentum only 

 *4).* A sound wave of frequency 400Hz is travelling in a gas at a 

speed of 320m/s. What is the phase difference between 

two points 0.2m apart in the direction of travel? 

A). Pie/4 rad

B. Pie/2 rad

C. Pie rad

D. 2pie/5 rad

 *5).* Periodic waves are always:

A. Transverse waves 

B. Longitudinal waves 

C. May be transverse or longitudinal

D.None 

 *6).* Newton assumed the propagation of longitudinal waves as:

A. Isothermal 

B. Isobaric

C. Adiabatic

D.All are possible According to him

 *7).* Velocity of longitudinal waves in liquid medium is:

A. Greater then solid medium

B. Equal to solid medium

C. Less than solid medium

D.Don’t propagate in liquid medium

 *8).* Moisture in air ...... the density of Air:

A. Increases

B. No effect

C. Decreases

D.May Increase or decrease

 *9).* The speed of sound is greater in:

A. Solid 

B. Liquid

C. Gas

D. Same in all cases

 *10).* Progressive waves of frequency 300Hz are 

superimposed to produce a system of stationary waves in 

which adjacent nodes are 1.5 m apart . Speed of progressive 

waves:

A. 100m/s

B. 450m/s

C. 600m/s

D. 900m/s

 *11).* If a string vibrates in two loops then the frequency is 

said to be in:

A. Fundamental note

B. 1

st overtone 

C. 2

nd overtone

D. 1

st harmonic

 *12).* The ratio of fundamental mode of vibration in

stretched wire is as 2:1 then the ratio of their length is:

A. 3:1

B. 1:2

C. 2:1

D. 1:1

 *13).* In a closed organ pipe , the 3rd harmonic is also said to 

be in :

A. Fundamental overtone

B. 1

st overtone

C. 2

nd overtone

D.None

 *14).* 2nd

 overtone of an Open organ pipe resonates with 3rd

harmonics of closed organ pipe . The ratio of their length 

will be :

A. 2:1

B. 1:2

C. 3:5

D. 5:3

 *15).* In SHM the P.E of a body is:

A. Maximum at mean position

B. Maximum at extremes 

C. Minimum at extremes

D.All are possible

 *16).* If a Bob mass of Simple pendulum 'A' is less than the 

mass of other pendulum ‘B’ then the Time period of A is:

A. Greater than B

B. Smaller than B 

C. Equal to B 

D.No effect

 *17).* Which of the following colour shows large wavelength:

A. Red 

B. Blue

C. Green

D.Orange

 *18).* According to Laplace correction sound travel in air 

under ..... Conditions.

A. Adiabatic 

B. Isobaric

C. Isothermal

D. Isochoric 

 *19).* What is the optimum phase difference for destructive 

interference between two waves of same frequency?

A. 90 degree

B. 180 degree

C. 270 degree

D. 360 degree

 *20).* A whistle emitting sound of 1000Hz approaches a 

stationary observer at one half of speed of sound . The 

observer hears frequency of :

A. 1000Hz

B. 2000Hz

C. 500Hz

D. 1500Hz

 *21).* Doppler’s effect is not observed when 

A. Source and observer are perpendicular in direction 

B. Distance between source and observer is constant

C. When both moving apart from each other 

D. Both a and b 

 *22).* All particles in standing waves except ...... Perform 

SHM:

A. Antinode 

B. Node

C. Midway Between node and antinode 

D.None 

 *23).* Sound waves don’t travel in vaccum because :

A. They are transverse waves

B. They are stationary waves 

C. They require material Medium for propagation 

D.All Of these 

 *24).* Volume remains constant in:

A. Isochoric 

B. Isobaric

C. Adiabatic

D. Isothermal

 *25).* During adiabatic expansion which of the following 

takes place ?

A. Cooling 

B. Heating

C. No effect on temp

D. Both a and b are possible

 *26).* Atmospheric changes are an example of :

A. Adiabatic process

B. Isometric process

C. Isobaric process

D.None 

 *27).* PV= constant is an example of which state ?

A. Isochoric 

B. Isothermal

C. Adiabatic

D.None 

 *28).* Molar specific heat of a diatomic gas is:

A. Smaller than monoatomic gas

B. Greater than monoatomic gas

C. Equal to monoatomic gas 

D.Half of monoatomic gas 

 *29).* Which of the following is an example of Adiabatic 

process:

A. Explosion of gases 

B. Brust of Air tube 

C. Melting of ice

D. Boiling of water 

 *30).* Both heat and work increase the temperature of an 

object . It means both are :

A. Same 

B. Different

C. Interconvertible 

D.None of these

 *31).* The internal energy of fixed mass of a gas depends 

upon:

A. P but not V or T

B. T but not P or V

C. V but not P or T

D.None of these 

 *32).* 2000J of heat supplied to the system while system 

does 1000J of work . Calculate the change in internal energy

of a system?

A. 1500J

B. 1000J

C. 1600J

D. 3000J

 *33).* The tempt of a gas at pressure P and volume V is 27 °C 

. If temperature is raised to 927°C , keeping the volume 

constant , then it’s pressure will be:

A. 2P 

B. 3P

C. 4P

D. 6P

 *34).* At constant temperature if volume of mass is halved, 

then the density of gas becomes?

A. Double 

B. Half 

C. Quarter 

D. Four times 

 *35).* In which process heat supplied is converted into work 

done ?

A. Isothermal

B. Isometric

C. Adiabatic

D. Isochoric 

 *36).* Heat added to the system taken as :

A. Positive

B. Negative

C. Can be positive or negative

D.No work done by a system 

 *37).* The slope between P and V in isobaric process is:

A. Zero

B. Constant

C. Curve 

D. Straight line 

 *38).* The amount of heat required to raise the temperature 

of 10 moles of water from 80 K to 90 K ( where molar heat 

capacity of water is 52.14J) is: 

A. 52.14J

B. 0.5214J

C. 5214J

D. 68.64J

 *39).* The work done in isochoric process is:

A. Constant 

B. Variable 

C. Zero 

D.All are possible

 *40).* The quantity of heat required to raise the temperature 

of unit mass of substrate by 1K is called:

A. Specific heat

B. Heat capacity

C. Molar specific heat 

D. Specific heat at constant pressure

 *41)* . Coloumb’s law is only applicable on 

A. Big charges 

B. Small charges 

C. Point charges 

D.All

 *42)* . The constant k in Columb’s law depends upon:

A. System of units 

B. Intensity of charge 

C. Nature of medium 

D. Both a and c

 *43)* . The force between two charged bodies is ‘F’ . If one 

charge is double and distance between them is also 

doubled , then the force acting on a body is:

A. 2F

B. 4F

C. 6F

D. F/2

 *44)* . The unit of electric intensity is:

A. Volt/meter

B. Newton/coloumb

C. Joule/coloumb.meter

D.All of these

 *45)* . There are two charges of 2 C and 10 C . The ratio of 

force acting on them will be :

A. 1:5

B. 5:1

C. 1:1

D. 2:1

 *46)* . Force between two charges is 8N . If we place mica of 

relatively 4 between two charges as a medium, the force is

reduced to?

A. 2N

B. 4N

C. 6N

D. 8N

 *47)* . Electric field at a distance of 10cm from an isolated 

point particle with a charge of 4x10^-9 is?

A. 3.60N/C

B. 360N/C

C. 390N/C

D. 3600N/C

 *48)* . The property of a medium which affects the 

magnitude of force between two point charges at rest is 

called?

A. Permeability

B. Force of constant k

C. Permittivity

D.None

 *49)* . The time constant RC has unit of:

A. Sec/farad

B. 1/sec

C. Ohm/sec

D.None of above

 *50)* . If a capacitor charges and discharges quickly , it means 

it have:

A. Large value of RC

B. Small value of RC

C. May be large or small RC

D.None of them 

 *51)* . Ohm x farad is equivalent to:

A . Weber

B. Tesla

C. Henry

D. Second

 *52)* . If a 10microC and 200microC capacitors are connected in 

parallel the net capacitance will be:

A. 1990micro C

B. 2010 micro C

C. 160 C

D. None 

 *53).* When two capacitors of same capacitance are connected in 

parallel and then in series , the capacitance in these cases are in 

ratio of :

A. 2:1

B. 1:2

C. 4:1

D. 1:4

 *54).* When capacitors are connected in parallel then the net 

capacitance will:

A. Increase

B. Decrease

C. Constant

D. None 

 *55).* A 25eV particle has a speed of :

A. 2x10^6 m/s

B. 3x10^6 m/s

C. 5x10^6 m/s

D. 1.5x10^2 m/s

 *56).* A charge of 2C is in a field of intensity 2N/C , the force on 

charge is:

A. 1N

B. 4N

C. 6N

D. 1.5N

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