Physics Past Paper PDF - November 2024

# Unattempted Questions ## Phy-Section A This section contains 35 SINGLE CORRECT TYPE questions. Each question has 4 choices (1). ### 1/200 A monkey of mass 60 kg climbs on a rope which can withstand a maximum tension of 900 N. For which of the following value of acceleration, monkey will not be...

# Unattempted Questions ## Phy-Section A This section contains 35 SINGLE CORRECT TYPE questions. Each question has 4 choices (1). ### 1/200 A monkey of mass 60 kg climbs on a rope which can withstand a maximum tension of 900 N. For which of the following value of acceleration, monkey will not be able to climb safely on the rope? - 4 m s^-2 - 5 m s^-2 - 0.8 m s^-2 - 8 m s^-2 ### 2/200 As shown in figure, find the tension T₂. A diagram of a horizontal bar with a weight of 5kg on the left, a weight of 3kg on the right, and a pushing force of 100 N to the right, with the bar labelled "smooth". - 62.5 N - 22.5 N - 77.5 N - Zero ### 3/200 If acceleration of block A in case 1 is a₁, in case 2 is a₂ and in case 3 is a₃, then a₁: a₂: a₃ is A diagram of 3 different setups: - Case 1 - A block labelled A is attached with a rope to a block labelled B and a string to block m. Block B is lifted vertically and Block A is hanging from the floor with the string fixed at a point on the ceiling. - Case 2 - Block A is attached with a rope to a block labelled B and a string to Block m. Block B is lifted vertically and Block A is hanging from the ceiling with the string attached to the ceiling. - Case 3 - Block A is attached to a block labelled B with a rope and Block B is attached to another block labelled B with a rope, all hanging from the ceiling. - 1:3:6 - 3:1:6 - 4:1:2 - 2:1:1 ### 4/200 A missile is fired for maximum range with an initial velocity 40 m/s. The range of the missile is (g = 10 m/s²) - 60 m - 160 m - 200 m - 40 m ### 5/200 A: Impulse and momentum have same dimensions. R: From Newton's 2nd law, impulse is equal to change in momentum. - Both Assertion & Reason are true and the reason is the correct explanation of the assertion - Both Assertion & Reason are true but the reason is not the correct explanation of the assertion - Assertion is true statement but Reason is false - Both Assertion and Reason are false statements ### 6/200 If the impulse I of a body varies with time t as I = (5t² - 10t + 1) kg m/s, then the change in momentum of body at t = 1 s is - 3 kg m/s - -4 kg m/s - Zero - -2 kg m/s ### 7/200 A coin placed on a rotating turn table just slips if it is placed at a distance of 6 cm from the centre. If angular velocity of turn table is doubled it will just slip at a distance of - 24 cm - 12 cm - 9 cm - 1.5 cm ### 8/200 A body is moving in a circular path of radius 10 m and its speed (v) as a function of time (t) is given by v = 3t, where t is in s and v is in m/s. The acceleration of body at t = 2 s is - 6.7 m/s² - 4.7 m/s² - 3.7 m/s² - 5.7 m/s² ### 9/200 A cyclist moving towards east with speed 10 m/s. He makes 90° right turn without changing the speed. Find average acceleration of the cyclist, if he takes √2 s in changing the direction of velocity. - 5 m/s² - 10 m/s² - 5√2 m/s² - 10√2 m/s² ### 10/200 A body in a uniform circular motion completes 280 revolutions per second. Its angular speed is - 1670 rad/s - 1760 rad/s - 1890 rad/s - 1260 rad/s ### 11/200 Two bodies of masses 2 kg and 3 kg are tied to the ends of a massless string which passes over a smooth pulley as shown in figure. The tension in the string AB is A diagram of a pulley system with a 2kg weight on the left and a 3kg weight on the right. The weight is attached to a string labelled AB. - 12 N - 24 N - 48 N - 16 N ### 12/200 The velocity of a projectile at the initial point O is (4i + 7j) m/s. Its velocity (in m/s) at point A will be, (g = 10 m/s²) A diagram of a projectile's path following a parabolic path from point O to point A. - -4i - 7j - 4i - 7j - 2i - 3j - 4i - 7j ### 13/200 Rain is falling vertically downwards with a speed of 6 km/h. A girl moves on a straight road with velocity 8 km/h. The magnitude of velocity of rain with respect to girl is - 14 km/h - 2 km/h - 10 km/h - 6 km/h ### 14/200 What is the acceleration of 5 kg mass? A diagram of a 5 kg mass and a 3 kg mass connected together moving to the right with a force of 16N. - 2 m/s² - 4 m/s² - 1 m/s² - 3 m/s² ### 15/200 The vertical height of the projectile, projected with speed u is maximum when angle of projection with the horizontal is - π/4 - π/2 - π/6 - π/3 ### 16/200 The mass of a lift is 2000 kg. When the tension in the supporting cable is 32000 N. Then its acceleration is (g = 10 m/s²) - 4.0 m/s² downwards - 6.0 m/s² downwards - 4.0 m/s² upwards - 6.0 m/s² upwards ### 17/200 A cricketer catches a ball of mass 200 g, moving with speed 25 m/s in 0.2 s. Then force experienced by cricketer is - 20 N - 25 N - 30 N - 40 N ### 18/200 For a man standing on a weighing machine in a moving escalator, the apparent weight would be more than true weight of the man if the elevator is - Moving up and slowing down - Moving down and speeding up - Moving up and speeding up - Moving down with constant speed ### 19/200 A: Static friction is self adjusting force. R: It can adjust the value from zero to upto a limit called limiting friction. - Both Assertion & Reason are true and the reason is the correct explanation of the assertion - Both Assertion & Reason are true but the reason is not the correct explanation of the assertion - Assertion is true statement but Reason is false - Both Assertion and Reason are false statements ### 20/200 In uniform circular motion which of the following quantity is zero? - Change in magnitude of acceleration - Magnitude of change in velocity - Change in magnitude of velocity - Both (1) & (3) ### 21/200 A river is flowing with velocity of 3 m/s. A boat can move with velocity of 4 m/s in still water. The width of river is 200 m. Minimum time required to cross the river is - 40 s - 50 s - 60 s - 70 s ### 22/200 Horizontal and vertical components of velocity of particle thrown from ground are 40 m/s and 30 m/s respectively at ground. Horizontal range of the projectile is - 120 m - 240 m - 180 m - 360 m ### 23/200 The momentum of a particle varies with time as P = 2t + 3t² (where P is in kg m/s and t is in seconds). The force acting on particle at t = 2 s is - 14 N - 12 N - 16 N - 20 N ### 24/200 Select the correct statement regarding Pseudo force - It is electromagnetic in origin - Newton's 3rd law is applicable for it - It is a fundamental force - It is used to make Newton's laws applicable in non-inertial frame ### 25/200 A machine gun fires n bullets per second and the mass of each bullet is m. If v is the speed of each bullet, then force required to keep the machine gun stationary is - mnv - mvn² - mnv² - mv/n ### 26/200 The equation of a projectile is y = 4x - 2x². Its horizontal range is (All quantities are in SI units and y is vertically upwards) - 8 m - 4 m - 1/2 m - 2 m ### 27/200 The minimum value of mass m so that whole system remains in equilibrium is A diagram of a pulley system with a mass m on a surface that has a coefficient of friction of 0.5 and a weight of 5kg hanging from the other side of the pulley. - 2 kg - 5 kg - 10 kg ### 28/200 Velocity of particle changes to v₂ = 12i + 5j + 4k from v₁ = 6i + 2j + 2k in 35 sec. The magnitude of average acceleration is - 1 m/s² - 7 m/s² - 0.2 m/s² - 5 m/s² ### 29/200 Breaking strength of a rope is 60% of the weight of a person. With what minimum acceleration, the person should slide down the rope, such that it does not break? - g/4 - 2g/5 - 9/5 - 3g/5 ### 30/200 If two vectors are given as A = 4i - 2j + k and B = i + j + 2k respectively, then (A-2B) will be - 6i + 4j + 5k - 2i - 4j - 3k - 2i - 4j - 5k - 6i - 4j - 5k ### 31/200 The path of one projectile as seen by an observer on another projectile (both in air) is - Straight line - Parabola - Ellipse - Circle ### 32/200 A machine gun fires 5 bullets per second and the mass of each bullet is 20 g. If 100 m/s is the speed of each bullet, then the force exerted on the machine gun is - 10 N - 20 N - 8 N - 15 N ### 33/200 A body is acted upon by number of balanced forces. Then the body - Must be at rest - May move with constant velocity - Must move with constant velocity - May accelerate ### 34/200 A rider on horse falls backward when horse starts running all of a sudden because of - Inertia of motion - Inertia of direction - Inertia of rest - Both (1) and (2) ### 35/200 A particle moves from a point having position vector (2i) m to another point having position vector (3j) m. The magnitude of displacement of particle is - 13 m - 14 m - 15 m - √13 m