NCERT Class 11/MCQ Questions for Class 11 Physics sets 2 Sample Test,Sample questions

1.2E0

2.E0

3.1.5 E0

4. -E0

1.0.6 m

2. 0.4 m

3.1 m

4.0.36 m

Question: `A block of mass M is placed on a flat surface. A force is applied to move it parallel to the surface. The frictional force f developed is proportional to the`

1.square of the mass of the body

2. mass of the body

3.reciprocal of the mass of the body

4. reciprocal of the square of the body

1.R

2. R/2

3.R/3

4. R/4

1.1 m/s

2.2 m/s

3.4 m/s

4.8 m/s

1. 2 mmÂ²

2.3 mmÂ²

3.4 mmÂ²

4.5 mmÂ²

1.490 J

2.50 J

3.100 J

4. 300 J

1.196 J

2. -196 J

3.20 J

4.zero

1. 25 J

2.125 J

3.1250 J

4.1000 J

1.316 J

2.216 J

3.116 J

4.392 J

1.9800 J

2.1000 J

3.5000 J

4. 3000 J

1.100 J

2.392 J

3.60 J

4.-100 J

1.1000 N

2.500 N

3.250 N

4.125 N

1.2 cm

2.3 cm

3.6 cm

4.9 cm

Question: `A dancer on ice spins faster when she folds here arms. This is due to`

1.Increases in energy and increase in angular momentum

2.Decrease in friction at the skates

3.Constant angular momentum and increase in kinetic energy

4.Increase in energy an decreases in angular momentum

Question: `A hollow cylinder and a solid cylinder having different mass diameter are released from rest simultaneously from the of an inclined plane. Which will reach the bottom first?`

1.solid cylinder

2. cant be determined without knowing their masses

3. hollow cylinder

4.cant be determined without knowing their diameters

1.300 J

2.150 J

3.600 J

4.zero

1.4

2.25

3.44

4.67

Question: `A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is`

1.Positive

2.Negative

3.Zero

4.may be positive or negative

Question: `A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop`

1. Increases

2.Is infinite

3. Remains unchanged

4.May decrease or increase depending upon size

1.3 m/s

2.4 m/s

3.5 m/s

4.Zero

Question: `A particle moves on a circular path with decreasing speed. Choose the correct statement.`

1.Angular momentum remains constant.

2.Acceleration is towards the centre

3.Particle moves on a spiral path with decreasing radius

4.The direction of angular momentum remains constant.

1.L/2

2.L/4

3.2 L

4.4 L

1.998 W

2.1002 W

3.2000 W

4.500 W

1. 25 N

2.50 N

3.100 N

4.200 N

Question: `A satellite S is move in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth .`

1. The acceleration of S is always directed towards the centre of the earth.

2.The total mechanical energy of S varies periodically with time.

3. The angular momentum of S about the centre of the earth changes in direction, but its magnitude remains constant.

4.The linear momentum of S remains constant in magnitude.

1.5g J

2.10g J

3.Zero

4.g J

1.2.5

2.5

3.1.5

4.3

Question: `A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same, which one of the following will not be affected?`

1.Moment of inertia

2.Angular momentum

3.Angular velocity

4.Rotational kinetic energy

1. g/2

2. g/3

3. g/4

4.2g/3

1.7.2 J

2.3.6 J

3.120 J

4.1200 J

1.150 kWh

2.200 kWh

3.100 kWh

4.300 kWh

Question: `An iron bar of length l m and cross section A mÂ² is pulled by a force of F Newton from both ends so as to produce and elongation in meters. Which of the following statement statements is correct`

1. Elongation is inversely proportional to length l

2.Elongation is directly proportional to cross section A

3.Elongation is inversely proportional to A

4. Elongation is directly proportional to Youngs modulus

1.y = -5 cm

2. y = +20 cm

3. y = +5 cm

4.y = -20 cm

Question: `At critical temperature, the surface tension of a liquid`

1.Is zero

2.Is infinity

3.Is the same as that at any other temperature

4.Can not be determined

1.12 kg mÂ²

2.3 kg mÂ²

3.6 kg mÂ²

4.9 kg mÂ²

Question: ```Choose the wrong statement from the following. ```

1.Small droplets of a liquid are spherical due to surface tension

2. Oil rises through the wick due to capillarity

3. In drinking the cold drinks through a straw, we use the phenomenon of capillarity

4. Gum is used to stick two surfaces. In this process we use the property of Adhesion

1. 40%

2.20%

3.10%

4.21%

Question: `Four wires whose lengths and diameter respectively are given below are made of the same material. Which of these will have the largest extension when same tension is applied?`

1.0.50 m, 0.50 mm

2.1.00 mm, 1.00 mm

3.2.00 m, 2.00 mm

4.4.00 m, 4.00 mm

1.Stress

2.Strain

3.Yield point

4.Elastic limit

Question: `If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along its`

2.Tangent

3.Circumference

4.Axis of rotation

1.(5/6) mgR

2.(6/7) mgR

3.(7/8) mgR

4.(8/9) mgR

1.t = Ia

2.t = Iw

3. I = tw

4.a = Iw

1.64.5

2.129

3.182.5

4.730

Question: `If the radius of the earth were to be raise by 1% its mass remaining the same, the acceleration due to gravity on the surface of the earth will`

1.increase by 1%

2.decrease by 2%

3. decrease by 1%

4.increase by 2%

1.Acute angle

2.Obtuse angle

3. 90Â°

4. 0Â°

1. E

2. 2 E

3.4 E

4.25 E

Question: `Longitudinal strain is possible in the case of`

1.Gases

2.Liquid

3.Only solids

4. Only gases & liquids

Question: ```Moment of inertia depends on ```

1. Distribution of particles

2.Mass

3.Position of axis of rotation

4.All of these

Question: `One end of a steel wire of area of cross-section 3 mmÂ² is attached to the ceiling of an elevator moving up with an acceleration of 2.2 m/sÂ². if a load of 8 kg is attached at its free end, then the stress developed in the wire will be`

1. 8 Ã— 106 N/mÂ²

2. 16 Ã— 106 N/mÂ²

3.20 Ã— 106 N/mÂ²

4.32 Ã— 106 N/mÂ²

Question: `One end of a towel dips into a bucket full of water and other end hangs over the bucket. It is found that after some time the towel becomes fully wet. It happens`

1.Because viscosity of eater is high

2.Because of the capillary action of cotton threads

3.Because of gravitational force

4.Because of evaporation of water.

1.Copper

2.Invar steel

3.Brass

4.Silver

1.Capillarity

2.Viscosity

3.Gravity

4.Elasticity

Question: `Pressure inside two soap bubbles is 1.01 and 1.02 atmospheres. ratio between their volume is`

1.102 : 101

2.(102)3 : (101)3

3.8 : 1

4. 2 : 1

Question: `Surface tension of a soap solution is 1.9 Ã— 10-2N/m. work done in blowing a bubble of 2.0 cm diameter will be`

1.7.6 Ã— 10-6 p J

2.15.2 Ã— 10-6 p J

3.1.9 Ã— 10-6 p J

4.1 Ã— 10-4 p J

1.11/âˆš2 km/s

2.11âˆš2 km/s

3.2 km/s

4. 11 km/s

1.7 km/sec

2.112 km/sec

3.12.2 km/sec

4.1.1 km/sec

Question: `The height of a liquid in a fine capillary tube`

1.Increases with an increase in the density of a liquid

2.Decreases with a decrease in the diameter of the tube

3.Decreases with an increase in the surface tension

4.Increases as the effective value of acceleration due to gravity is decreased

1.1 cm

2.0.1 cm

3.2 cm

4. 4 cm

1.4 I

2. 6 I

3.8 I

4. 9 I

1.103 N

2. 104 N

3.105

4.109 N

1.1 : 2

2.2 : 1

3.3 : 5

4.5 : 3

1. rÂ²g / w

2.RÂ²wÂ²/ g

3.RG wÂ²

4.RÂ²g / wÂ²

Question: `The moment of inertia of a uniform semicircular disc of mass M and radius about a line perpendicular to the plane of the disc through the centre is`

1.(2/5) MrÂ²

2.(1/4) Mr power 2

3.(1/2) MrÂ²

4. MrÂ²

1.2 : 1

2.4 : 1

3.1 : 4

4. 1 : 2

Question: `The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as`

1.Youngs modulus

2.Poissons ratio

3.Lateral strain

4.Shearing strain

1.Plane

2.concave

3.convex

4. Both b and c

1.10 hours

2.20 hours

3.40 hours

4.80 hours

1.0.09Â°

2.0.9Â°

3.9Â°

4.90Â°

1.9.8 m/secÂ²

2.4.9 m/secÂ²

3.19.6 m/secÂ²

4.2.45 m/secÂ²

Question: `There is no atmosphere on the moon because`

1.it is closer to the earth

2.it revolves round the earth

3.it gets light from the sun

4.the escape velocity of gas molecules is less than their root mean square velocity here

1.4 : 1

2.1 : 2

3.0 : 1

4.1 : 6

1.4 : 3

2.16 : 9

3. 09 : 16

4.3 : 4

1. 4 : 1

2. 1 : 4

3. 1 : 2

4.2 : 1

1.2 : 3

2. 3 : 4

3.4 : 3

4.9 : 16

1. M

2.2M

3.M/2

4.4M

1.4 cm

2.6 cm

3.8 cm

4. 2 cm

1.4 mm

2.1 mm

3.3 mm

4.1 cm

1.1032 days

2.129 days

3. 365 days

4.730 days

Question: `When the intermolecular distance increases due to tensile force, then`

1.There is no force between the molecules

2.There is a repulsive force between the molecules

3.There is an attractive force between the molecules

4.There is zero resultant force between the molecules

1.300

2.150

3.100

4.50

1.t = I a

2.F = ma

3.L = I w

4. I = t a

1.Cavendish

2.Copernicus

3.Brook Taylor

4.None of these

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