Major Competitive Exams

Q. If A = {x | x is an even integer} and B = {x | x is a prime number}, what is A ∩ B?
  • A. {2}
  • B. {2, 3}
  • C. {2, 4}
  • D. {}
Q. If A = {x | x is an even number} and B = {x | x is a multiple of 3}, what is A ∪ B?
  • A. {0, 2, 4, 6, ...}
  • B. {0, 3, 6, 9, ...}
  • C. {0, 2, 3, 4, 6, 9, ...}
  • D. {0, 1, 2, 3, ...}
Q. If A = {x | x is an even number} and B = {x | x is a prime number}, what is A ∩ B?
  • A. {2}
  • B. {2, 3}
  • C. {2, 4}
  • D. {}
Q. If A = | 1 2 | | 3 4 |, find det(A).
  • A. -2
  • B. 2
  • C. 0
  • D. 4
Q. If A = | 1 2 | | 3 4 |, what is det(A)?
  • A. -2
  • B. 2
  • C. 0
  • D. 4
Q. If A = | 1 2 | | 3 5 |, what is det(2A)?
  • A. -10
  • B. 10
  • C. 20
  • D. 40
Q. If a bag contains 4 green and 6 yellow marbles, what is the probability of picking a yellow marble?
  • A. 2/5
  • B. 3/5
  • C. 4/5
  • D. 1/5
Q. If a bag contains 4 green and 6 yellow marbles, what is the probability of picking a green marble?
  • A. 2/5
  • B. 4/10
  • C. 4/6
  • D. 1/3
Q. If a battery provides a voltage of 9 V and is connected to a circuit with a total resistance of 3 ohms, what is the power consumed by the circuit?
  • A. 27 W
  • B. 18 W
  • C. 9 W
  • D. 3 W
Q. If a beam is supported at both ends and a load is applied at the center, what is the reaction force at each support?
  • A. Equal to the load
  • B. Half the load
  • C. Double the load
  • D. Zero
Q. If a beam of light passes through a prism with an angle of 60 degrees and the refractive index of the prism is √3, what is the angle of minimum deviation?
  • A. 30 degrees
  • B. 60 degrees
  • C. 45 degrees
  • D. 15 degrees
Q. If a bill is introduced in the Lok Sabha and it takes 3 readings to pass, and each reading takes 5 days, how many days does it take to pass the bill?
  • A. 10
  • B. 15
  • C. 20
  • D. 25
Q. If a bill is introduced in the Lok Sabha and it takes an average of 15 days to pass, how many days will it take to pass 5 such bills?
  • A. 60
  • B. 70
  • C. 75
  • D. 80
Q. If a block is on a horizontal surface and a force is applied at an angle, how does this affect the normal force acting on the block?
  • A. Increases normal force
  • B. Decreases normal force
  • C. No effect on normal force
  • D. Depends on the angle
Q. If a boat can travel 20 km upstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 10 km/h?
  • A. 2 km/h
  • B. 3 km/h
  • C. 4 km/h
  • D. 5 km/h
Q. If a boat can travel at 15 km/h in still water and the current is 5 km/h, what is the speed of the boat upstream?
  • A. 10 km/h
  • B. 15 km/h
  • C. 20 km/h
  • D. 25 km/h
Q. If a body has a moment of inertia of 15 kg m² and is subjected to a torque of 5 N m, what is its angular acceleration?
  • A. 0.33 rad/s²
  • B. 0.5 rad/s²
  • C. 1 rad/s²
  • D. 3 rad/s²
Q. If a body is moving in a circular path with a constant speed, what type of acceleration does it experience?
  • A. Centripetal acceleration
  • B. Linear acceleration
  • C. Angular acceleration
  • D. No acceleration
Q. If a body is moving in a circular path with a constant speed, which of the following statements is true?
  • A. The body is in equilibrium
  • B. The net force acting on the body is zero
  • C. The body experiences a centripetal force
  • D. The body has no acceleration
Q. If a body is moving in a circular path with a radius of 10 m and completes one full revolution in 5 seconds, what is its angular velocity?
  • A. 0.2 rad/s
  • B. 1.25 rad/s
  • C. 2 rad/s
  • D. 4 rad/s
Q. If a body is moving in a circular path with uniform speed, which of the following statements is true?
  • A. The body has no acceleration
  • B. The body has constant velocity
  • C. The body experiences centripetal acceleration
  • D. The body moves in a straight line
Q. If a body is moving in a straight line and no external torque acts on it, what can be said about its angular momentum?
  • A. It is zero
  • B. It is constant
  • C. It increases
  • D. It decreases
Q. If a body is rotating with an angular momentum L and its moment of inertia is halved, what will be the new angular momentum if the angular velocity remains constant?
  • A. L
  • B. 2L
  • C. L/2
  • D. 4L
Q. If a body moves in a circular path with a constant speed, which of the following statements is true?
  • A. The body has zero acceleration
  • B. The body has constant acceleration
  • C. The body has uniform velocity
  • D. The body experiences centripetal acceleration
Q. If a box contains 3 red balls and 2 blue balls, what is the probability of randomly selecting a red ball?
  • A. 1/2
  • B. 3/5
  • C. 2/5
  • D. 1/5
Q. If a capacitor has a capacitance of 10 µF and is charged to 5 V, what is the charge on the capacitor?
  • A. 50 µC
  • B. 5 µC
  • C. 2 µC
  • D. 10 µC
Q. If a capacitor is charged and then short-circuited, what happens to the charge on the capacitor?
  • A. It remains the same
  • B. It is discharged
  • C. It increases
  • D. It becomes zero
Q. If a capacitor is charged to 12V and has a capacitance of 6μF, what is the stored energy? (2022)
  • A. 0.432 mJ
  • B. 0.072 mJ
  • C. 0.864 mJ
  • D. 0.216 mJ
Q. If a capacitor is charged to a voltage of 5 V and then disconnected from the battery, what happens to the charge on the capacitor if the voltage is increased to 10 V? (2023)
  • A. Charge increases
  • B. Charge decreases
  • C. Charge remains the same
  • D. Charge becomes zero
Q. If a capacitor is charged to a voltage V and then connected in parallel with an uncharged capacitor, what will be the final voltage across both capacitors?
  • A. V
  • B. V/2
  • C. 2V
  • D. 0
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