# NCERT Class 11/MCQ Questions for Class 11 Physics sets 3 Sample Test,Sample questions

1.40 units

2.160 units

3.320 units

4.640 units

1.50 cal/cmÂ²s

2.250 cal/cmÂ²s

3.80 cal/cmÂ²s

4.100 cal/cmÂ²s

1.30Â°C

2. 28Â°C

3. 36Â°C

4.32Â°C

## Question: `A bucket full of hot water is kept in a room and it cools from 75Â°C to 70Â°C in t1 minutes from 70Â°C to 65Â°C in t2 minutes and from 65Â°C to 60Â°C in t3 minutes; then`

1. t1 â€“ t2 = t3

2.t1 < t2 < t3

3.t1 > t2 > t3

4. t1 < t2 > t3

1.275 K

2.325 K

3.250 K

4.380 K

1.50 sec

2.90 sec

3.60 sec

4.30 sec

1.(T14 â€“ T24)

2. (T1 â€“ T2)4

3.(T14 + T24)

4.(T13 â€“ T23)

## Question: `A person with dark skin as compared to a person with white skin will experience`

1.Less heat and less cold

2.More heat and more cold

3.More heat and less cold

4.Less heat and more cold.

1. 720 m/s

2.820 m/s

3.920 m/s

4.1020 m/s

1. HÂ²

2.FÂ²

3.OÂ²

4.ClÂ²

1.242 / 252

2.2

3.5 / 6

4.11 / 6

1.P

2.2p

3. 4p

4.16p

1.Zero

2.Infinity

3.One

4.Constant

## Question: `According to kinetic theory of gases, at absolute zero of temperature`

1.Water freezes

2.Liquid helium freezes

3.Molecular motion stops

4.Liquid hydrogen freezes

1.124Â°C

2.37Â°C

3.62Â°C

4.99Â°C

## Question: `An ideal gas is that which can`

1.Be solidified

2.Liquefied

3.Not be liquefied

4.Not be solidified

1.320 Hz

2. 300 Hz

3.280 Hz

4. 260 Hz

1.0.25 km/s

2.0.5 km/s

3.0.75 km/s

4.6 km/s

## Question: ```At a given volume and temperature, the pressure of a gas ```

1.varies inversely as its mass

2. varies inversely as the square of its mass

3. varies linearly as its mass

4.is independent of its mass

## Question: `Average kinetic energy of molecules is`

1.Directly proportional to square root of temperature

2.Directly proportional to absolute temperature

3.Independent of absolute temperature

4.Inversely proportional to absolute temperature

1.a + r + 1 = 1

2.a + r + t1 1

3.a + r = -t

4.a1 r + 1

1. 900 cal

2. 625 cal

3.750 cal

4.1000 cal

1.Î”Q

2.Î”W

3.Î”Q + Î”W

4. Î”Q â€“ Î”W

1.20 J

2.-20 J

3. 80 J

4.zero

1. A and D

2.B and C

3.C and A

4. A and B

1. 2

2. 3/2

3. 4/3

4. 5/3

1.1

2.2

3.5

4.0

## Question: `Energy is not carried by`

1.Longitudinal progressive waves

2. Electromagnetic waves

3.Transverse progressive waves

4.Stationary wave

## Question: `Energy supplied to convert unit mass of substance from solid to liquid state at its melting point is called`

1.Latent heat of fusion

2.Evaporation

3.Solidification

4.Latent heat of fission

1.Oxygen

2.Nitrogen

3.Hydrogen

4.Carbon dioxide

1.5 : 3

2.3 : 5

3. 1 : 1

4.5 : 7

1.5 : 3

2.3 : 5

3. 1 : 1

4.5 : 7

## Question: `For a gas, the r.m.s. speed at 800K is`

1. Half the value at 200 K

2.Double the value at 200 K

3.Same as at 200 K

4.Four times the value at 200 K

## Question: `For a magnet of time period T magnetic moment is M, if the magnetic moment becomes one fourth of the initial value, then the time period of oscillation becomes.`

1.Half of initial value

2.One fourth of initial value

3.Double of initial value

4.Four time initial value

1.Combustion

3.Convection

4.Conduction

## Question: `Heat cannot by itself flow from a body at lower temperature to a body at higher temperature is a statement as a conseqence of`

1.conservation of mass

2.conservation of momentum

3.first law of thermodynamics

4.second law of thermodynamics

1. 41.90 J/kcal

2.4190 J/cal

3.4.19 J/kcal

4.4.19 J/cal

## Question: `If a hole is bored along the diameter of the earth and a stone is dropped into the hole`

1.The stone reaches the centre of the earth and stops there

2.The stone reaches the other side of the earth and stops there

3. The stone executes simple harmonic motion about the centre of the earth

4.The stone reaches the other side of the earth and escapes into space

1. 3427 sec

2.3727 sec

3.3927 sec

4. 864 sec

## Question: `In damped oscilation the directions of the restoring force and the resistive force`

1.are the same

2.are opposite

3.may be same or opposite

4.have no relation with each other

## Question: `In damped oscilation, the angular frequency of the oscillator`

1. keeps on decreasing

2.keeps on increasing

3.emains the same

4. fluctuates

## Question: `In SHM, graph of which of the following is a straight line?`

1.T.E. against displacement

2.P.E. against displacement

3.Acceleration against time

4.Velocity against displacement

## Question: `In the case of forced oscillations, which of the following statements is not true?`

1.frequency equals that of external periodic force

2.amplitude depends upon the damping coefficient

3.amplitude tends to infinity at resonance

4.higher the damping coefficient, lower is the amplitude at resonance

## Question: `Latent heat of ice is`

1.Less than external latent heat of fusion

2.Equal to external latent heat of fusion

3.More then external latent heat of fusion

4. Twice the external latent heat of fusion

1.10%

2.1%

3.21%

4.42%

## Question: `Loudness of a note of sound is`

1.Directly proportional to amplitude of the wave

2.Directly proportional to square of amplitude of wave

3.Directly proportional to velocity of the wave

4.Directly proportional to square of velocity of the wave

## Question: `Moon has no atmosphere because`

1.It is far away form the surface of the earth

2.Its surface temperature is 10Â°C

3.The r.m.s. velocity of all the gas molecules is more then the escape velocity of the moons surface

4.The escape velocity of the moons surface is more than the r.m.s velocity of all molecules

1. 96.6 J

2.124 J

3.198.8 J

4.215.4 J

1.1.5

2.2.5

3.1.0

4.2

1.spring clock

2.pendulum clock

3.both

4.None

## Question: `Real gases show mark able deviation from that of ideal gas behavior at`

1.High temperature and low pressure

2.Low temperature and high pressure

3.High temperature and high pressure

4.Low temperature and low pressure

1. 0 cm

2.6 cm

3. 2 cm

4.cm

1.Infinite

2.Varies

3.Maximum

4.Zero

1. 5 10-20 J

2.10 10-20 J

3.15 10-20 J

4.20 10-20 J

## Question: `The best ideal black body is`

1. Lamp of charcoal heated to high temperature

2.Metal coated with a black dye

3.Glass surface coated with coalter

4.Hollow enclosure blackened inside and having a small hole

## Question: `The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hall near the bottom of the oscillating bob gets suddenly unplugged. During observation, till water is coming out, the time -period of the oscillation would`

1.first decrease and then increase to the original value

2.first increase and then decrease to the original value

3.increase towards a saturation value

4. remain unchanged

1. two

2.three

3.four

4.five

1.2

2.4

3.8

4.16

1.5801 K

2.106 K

3. 50.1 K

4. 2801 C

## Question: `The frequency of the note produced by plucking a given string increases as`

1. The length of the string increases

2.The tension in the string increases

3.The tension in the string decreases

4.The mass per unit length of the string increases

## Question: `The good absorber of heat are`

1.Non-emitter

2.Poor-emitter

3.Good-emitter

4.Highly polished

1.4 Ã— 10-2 m

2.4 Ã— 10-1 m

3.4 Ã— 10 m

4. 4 Ã— 100 m

1. 0.001

2.0.02

3. 0.1

4.0.2

1.âˆ

2.1/âˆ

3. 2âˆ

4.4

1.4 sec

2. 1 sec

3.2 sec

4.8 sec

1.Conduction

2.Convection

4.Reflection

## Question: `The specific heat of a gas`

1.Has only one value

2.Has two values CP and CV

3. Is proportional to the square root of its absolute temperature

4. Can have any value between 0 and infinity

1.10059Â°C

2.10059 K

3.10332Â°C

4.10332 K

1. 357Â°C

2. 457Â°C

3.547Â°C

4.820Â°C

1.1.36 times

2.2.36 times

3. 3.36 times

4.4.36 times

1.10 J

2.20 J

3.30 J

4.50 J

1. (3/2) RT

2.(9/2) RT

3.(1/3) RT

4.(5/2) RT

1.T

2.1.02 T

3.0.99 T

4.1.01 T

1.256 : 81

2.81 : 256

3. 3 : 4

4. 4 : 3

1. W/ m KÂ²

2.W/ mÂ² KÂ²

3.WÂ²/ mÂ² K4

4.W/ mK

1.10 cm

2.5 cm

3.2.5 cm

4. 20 cm

1.J kg/Â°c

2.J/kgÂ°c

3. kgÂ°c/J

4. J kg/Â°cÂ²

1. work

2.volume

3.pressure

4.Temperature

## Question: ```With the increase in temperature, the frequency of the sound from an organ pipe ```

1.Decreases

2.Increases

3.Remain unchanged

4.Changes erratically

## More MCQS

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