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Model Paper 10 Physics - Model Paper 10

Gujarat Board (GSEB) - STD 11 Science - Physics (GSEB - English Medium). 38 questions in this chapter.

Question types

Model Paper 10 question types

38 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

38
Questions
6
Question groups
5
Question types
Sample Questions

Model Paper 10 questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Consider two rods of same length and different specific heats $\left( c _1, c _2\right)$, thermal conductivities $\left( K _1, K_2\right)$ and area of cross-sections $\left(A_1, A_2\right)$ and both having temperatures $\left(T_1, T_2\right)$ at their ends. If their rate of loss of heat due to conduction is equal, then:
  • A
    $\frac{K_2 A_1}{c_2}=\frac{K_1 A_2}{c_1}$
  • B
    $K _1 A_1= K _2 A_2$
  • C
    $K _2 A_1= K _1 A_2$
  • D
    $\frac{K_1 A_1}{c_1}=\frac{K_2 A_2}{c_2}$
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Q 2M.C.Q (1 Marks)1 Mark
A Merry-go-round, made of a ring-like platform of radius $R$ and mass $M$, is revolving with angular speed $\omega$. A person of mass M is standing on it. At one instant, the person jumps off the round, radially away from the centre of the round (as seen from the round). The speed of the round afterwards is
  • A
    $2 \omega$
  • B
    $0$
  • C
    $\frac{\omega}{2}$
  • D
    $\omega$
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Q 3M.C.Q (1 Marks)1 Mark
As observed from earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from earth, this would
  • A
    not be true because the major gravitational force on mercury is due to sun
  • B
    not be true because mercury is influenced by forces other than gravitational forces
  • C
    be similarly true
  • D
    not be true because the force between earth and mercury is not inverse square law
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Q 4M.C.Q (1 Marks)1 Mark
A steel ball is dropped in oil, then
  • A
    the speed of ball will keep on decreasing
  • B
    the ball stops
  • C
    the ball attains constant velocity after some time
  • D
    the speed of ball will keep on increasing
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Q 5M.C.Q (1 Marks)1 Mark
The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are (velocity of sound $=340 ms^{-1}$ )
  • A
    4
  • B
    6
  • C
    7
  • D
    5
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Q 102 Marks Questions2 Marks
The wavelength $\lambda$ associated with a moving particle depends upon its mass m , its velocity v and Planck's constant h. Show dimensional relation between them.
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Q 113 Marks Question3 Marks
A soap bubble of radius 4 cm and surface tension 30 dyne $cm ^{-1}$ is blown at the end of a tube of length 10 cm and internal radius 0.20 cm . If the viscosity of air is $1.89 \times 10^{-4}$ poise, find the time taken by the bubble to be reduced to a radius of 2 cm .
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Q 123 Marks Question3 Marks
Eight rain drops of radius 1 mm each falling down with terminal velocity of $5 cms ^{-1}$ coalesce to form a bigger drop. Find the terminal velocity of the bigger drop.
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Q 133 Marks Question3 Marks
A body of mass 15 kg is hung by a spring balance in a lift. What would be the reading of the balance when
i. the lift is ascending with an acceleration of $2 ms^{-2}$
ii. descending with the same acceleration
iii. descending with a constant velocity of $2 ms^{-1}$ ?
Take $g =10 ms^{-2}$.
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Q 153 Marks Question3 Marks
a. State impulse-momentum theorem.
b. A ball of mass 0.1 kg is thrown against a wall. It strikes the wall normally with a velocity of $30 m / s$ and rebounds with a velocity of $20 m / s$. Calculate the impulse of the force exerted by the ball on the wall.
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Q 185 Marks Questions5 Marks
At what angle should a body be projected with a velocity $24 ms^{-1}$ just to pass over the obstacle 16 m high at a horizontal distance of 32 m ? Take $g =10 ms^{-2}$.
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Q 205 Marks Questions5 Marks
The motion of a particle executing simple harmonic motion is described by the displacement function, $x ( t )= A \cos (\omega t$ $+\phi)$ If the initial $(t=0)$ position of the particle is 1 cm and its initial velocity is $\omega cm / s$, then what are its amplitude and initial phase angle? The angular frequency of the particle is $\pi s ^{-1}$. If instead of the cosine function, we choose the sine function to describe the $SHM , x = B \sin (\omega t +\phi)$, then what are the amplitude and initial phase of the particle with the above initial conditions?
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Q 21Case study (4 Marks)4 Marks
Gas molecules move in random motion inside the container. The pressure exerted by the gas is due to the continuous collision of the molecules against the walls of the container. Due to this continuous collision, the walls experience a continuous force which is equal to the total momentum imparted to the walls per second.
Image

1.If the mass of each molecule is halved and speed is doubled, find the ratio of initial and final pressure:
(a) $1: 16$ (b) $1: 4$ (c) $1: 8$ (d) $1: 2$
2. The pressure exerted by the gases is:
(a) inversely proportional to the density
(b) inversely proportional to the square of the density
(c) directly proportional to the density
(d) directly proportional to the square of the density
3.If the force of attraction between the molecules suddenly disappears, then what will be the change in pressure:
(a) pressure increase
(b) pressure decrease
(c) pressure remains constant
(d) pressure falls
4. If the pressure of a given gas is halved at a certain temperature. what will be its volume:
(a) becomes triple (b) becomes double (c) remains constant (d) becomes half
OR
Dimension formula for $R$ ?
(a) $M ^1 L^2 T^2 K^{-1}$ (b) $M ^1 L^1 T^{-1}$ (c) $M ^{-1} L^0 T^1$ (d) $M ^1 L^2 T^{-2} K^{-1}$
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Q 22Case study (4 Marks)4 Marks
The kinetic energy of an object is the energy associated with the object which is under motion. It is defined as "the energy required by a body to accelerate from rest to stated velocity." It is a vector quantity and the momentum of an object is the virtue of its mass. It is defined as the product of mass and velocity. It is a vector quantity. The relation between them is given by $E =\frac{P^2}{2 m}$. In case of the elastic collision both of these quantities remain constant.
Image

1. Two masses of 1 gm and 4 gm are moving with equal linear momentum. The ratio of their kinetic energy is:
(a) $1: 2$ (b) $4: 1$ (c) $1: 1$ (d) $4: 2$
2. If the linear momentum is increased by $50 \%$, then K.E will be increased by:
(a) $50 \%$ (b) $200 \%$ (c) $125 \%$ (d) $100 \%$
3. A heavy object and a light object have the same momentum. Which has the greater speed?
(a) both heavy and light object
(b) heavy object
(c) Moderate object
(d) light object
OR
When a body moves with a constant speed along a circle then
(a) no acceleration is produced
(b) no work is done on it
(c) no displacement on it
(d) no force acts on it
4. Kinetic energy with any reference must be __________.
(a) Change (b) negative (c) zero (d) positive
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Q 23Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Two vectors are equal when their magnitude and direction both are equal.
Reason (R): For any two vectors $\overrightarrow{ A }$ and $\overrightarrow{ B }$, if angle between them is $\frac{\pi}{4}$ rad, then $\overrightarrow{ A } \times \overrightarrow{ B }=\overrightarrow{ A } \cdot \overrightarrow{ B }$.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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Q 24Assertion (A) & Reason (B) MCQ1 Mark
Assertion: The time period of revolution of a satellite close to surface of earth is smaller than that revolving away from surface of earth.
Reason: The square of time period of revolution of a satellite is directly proportional to cube of its orbital radius.
  • A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
  • B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  • C
    Assertion is correct statement but reason is wrong statement.
  • D
    Assertion is wrong statement but reason is correct statement.
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Q 25Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Efficiency of a Carnot engine increases on reducing the temperature of sink.
Reason (R): The efficiency of a Carnot engine is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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Q 26Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): A quick collision between two bodies is more violent than slow collision, even when initial and final velocities are identical.
Reason (R): The rate of change of momentum determines that the force is small or large.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
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