A liquid boils when its vapour pressure is equal to
- Aatmospheric pressure
- Bdouble of atmospheric pressure
- C6.0 cm of Hg column
- D1000 pa or more
Question types
Model Paper 8 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
01
M.C.Q (1 Marks)
12 Q→022 Marks Questions
6 Q→033 Marks Question
8 Q→045 Marks Questions
6 Q→05Case study (4 Marks)
2 Q→06Assertion (A) & Reason (B) MCQ
4 Q→Sample Questions
Model Paper 8 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
The instantaneous angular position of a point on a rotating wheel is given by the equation $\theta(t)=2 t^3-6 t^2$. The torque on the wheel becomes zero at
- A$t =0.25 s$
- B$t =0.5 s$
- C$t=2 s$
- D$t=1 s$
Deimos, a moon of Mars, is about 12 km in diameter with mass $2.0 \times 10^{15} kg$. Suppose you are stranded alone on Deimos and want to play a one-person game of baseball. You would be the pitcher, and you would be the batter! With what speed would you have to throw a baseball so that it would go into a circular orbit just above the surface and return to you so you could hit it?
- A4.7 m/s
- B5.1 m/s
- C4.3 m/s
- D4.9 m/s
A raindrop is released from a cloud 1000 m above ground. When the drop is about to hit the ground, its speed will be
- ACannot be predicted
- BConstant terminal speed
- CDecreasing due to retardation from air drag
- DIncreasing due to acceleration due to gravity
The wavelength difference of light waves of wave numbers $2 \times 10^6 / m$ and $2.25 \times 10^6 / m$ is
- A$0.556 \times 10^6 m$
- B$0.556 \times 10^{-6} m$
- C$0.0556 \times 10^6 m$
- D$0.0556 \times 10^{-6} m$
A spherical planet has mass $M _{ P }$ and diameter $D _{ P }$. A particle of mass $m$ falling freely near the surface of this planet will experience acceleration due to gravity, equal to whom?
View full solution →Two bodies of masses $M$ and $m(M>m)$ are allowed to fall freely from the same height. If air resistance for each body is same, which one will reach the ground first.
View full solution →
Consider a simple pendulum, having a bob attached to a string, that oscillates under the action of the force of gravity. Suppose that the period of oscillation of the simple pendulum depends on its length (l), mass of the bob (m) and acceleration due to gravity (g). Derive the expression for its time period using method of dimensions.
State the rules for finding the number of significant figures in a measurement.
A ball floats on the surface of water in a container exposed to the atmosphere. Will the ball remain immersed at its initial depth or will it sink or rise somewhat if the container is shifted to the moon?
In a glass capillary tube, water rises upto a height of 10.0 cm while mercury fall down by 5.0 cm in the same capillary. If the angles of contact for mercury glass is $60^{\circ}$ and water glass is $0^{\circ}$, then find the ratio of surface tension of mercury and water.
View full solution →A moving neutron with speed $10^6 m / s$ collides with a deuteron at rest and sticks to it. Find the speed of the combination if masses of the neutron and deuteron are $1.67 \times 10^{-27} kg$ and $3.34 \times 10^{-27} kg$, respectively.
View full solution →In a refrigerator, heat from inside of a refrigerator at 270 K is transferred to a room at 300 K .
i. What is its coefficient of performance?
ii. How much heat will be delivered to the room for each joule of electric energy consumed? Assume the refrigerator to be an ideal one.
i. What is its coefficient of performance?
ii. How much heat will be delivered to the room for each joule of electric energy consumed? Assume the refrigerator to be an ideal one.
State three basic laws of motion. Show that the first law of motion gives the definition of force and the second law of motion gives the measure of force.
State the law of conservation of angular momentum and illustrate it with the example of planetary motion.
A particle of mass $m$ is released from point P at $x = x _0$ on the X -axis from origin O and falls vertically along the Y-axis, as shown in Fig.
i. Find the torque $t$ acting on the particle at a time $t$ when it is at point Q with respect to O .
ii. Find the angular momentum L of the particle about O at this time t .
iii. Show that $\tau=\frac{d L}{d t}$ in this example.
View full solution →i. Find the torque $t$ acting on the particle at a time $t$ when it is at point Q with respect to O .
ii. Find the angular momentum L of the particle about O at this time t .
iii. Show that $\tau=\frac{d L}{d t}$ in this example.
On an open ground, a motorist follows a track that turns to his left by an angle of $60^{\circ}$ after every 500 m . Starting from a given turn, specify the displacement of the motorist at the third, sixth and eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case.
View full solution →A marble rolls along a table at a constant speed of $1.00 m / s$ and then falls off the edge of the table to the floor 1.00 m below,
i. How long does the marble take to reach the floor?
ii. At what horizontal distance from the edge of the table does the marble land?
iii. What is its velocity as it strikes the floor?
View full solution →i. How long does the marble take to reach the floor?
ii. At what horizontal distance from the edge of the table does the marble land?
iii. What is its velocity as it strikes the floor?
Find the total energy of the particle executing S.H.M. and show graphically the variation of P.E. and K.E. with time in S.H.M. What is the frequency of these energies with respect to the frequency of the particle executing S.H.M?
Assertion (A): If $\vec{A}$ is parallel to $\vec{B}$ then $\vec{A} \times \vec{B}$ is a null vector.
Reason (R): The magnitude cross product of two vectors is given by, $|\vec{A} \times \vec{B}|= AB \sin \theta$.
Reason (R): The magnitude cross product of two vectors is given by, $|\vec{A} \times \vec{B}|= AB \sin \theta$.
- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Assertion: Moon travellers tie heavy weight at their back before landing on moon.
Reason: The value of g is small at moon.
Reason: The value of g is small at moon.
- AAssertion and reason both are correct statements and reason is correct explanation for assertion.
- BAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Asseertion: Thermodynamics processes in nature are irreversible.
Reason: Dissipative effects cannot be eliminated.
Reason: Dissipative effects cannot be eliminated.
- AAssertion and reason both are correct statements and reason is correct explanation for assertion.
- BAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Assertion: In elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision.
Reason: In an elastic collision, the linear momentum is conserved.
Reason: In an elastic collision, the linear momentum is conserved.
- AAssertion and reason both are correct statements and reason is correct explanation for assertion.
- BAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
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