All Free Physics MCQs with Answers
Every Physics question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
13,934 questions · page 695 of 697
- A. Elasticity
- B. Density
- C. Homogeneity
- D. All of the above
Explanation: The correct answer is D, "All of the above" because the wave velocity in any medium depends on all of these factors: elasticity, density…
Correct answer: All of the above- A. 50 nm
- B. 500 nm
- C. 5000 nm
- D. 100 nm
Explanation: Using the formula v = fλ, where speed of light in vacuum (v) = 3 x 108 m/sF = 6 × 14 Hzλ = v/f = 3 x 108 / 6 × 1014 λ = 500 nm
Correct answer: 500 nm- A. 16
- B. 8
- C. Speed remains same
- D. None is true
Explanation: If the absolute temperature of deuterium is increased by a factor of 16, the speed of sound waves in deuterium will also increase by the…
Correct answer: 16- A. mg
- B. Zero newton
- C. m/g
- D. mg/R2
Explanation: Zero. The force of gravity is counterbalanced by the force of angular acceleration.That's how it stays in orbit.Have you ever seen any…
Correct answer: Zero newton- A. Double
- B. Half
- C. Zero
- D. Negative
Explanation: When an object is in free fall, such as a pilot diving down with an acceleration equal to gravity (9.8 m/s-2), it experiences…
Correct answer: Zero- A. g=0
- B. It is falling freely
- C. No force acts on it
- D. It is far away from the earth
Explanation: No force acts on it: This option is incorrect. There is a force acting on the object due to gravity, but it is balanced by the centripetal…
Correct answer: No force acts on it13887. The pilot weighting 686N dived down with an acceleration of 9.8m sec-2 its apparent weight is
- A. 343N
- B. 1372 N
- C. 686 N
- D. Zero
Explanation: The net force is equal to the sum of the gravitational force and the force due to acceleration:Net force = Gravitational force + Force due…
Correct answer: Zero13888. The weight of a pilot when diving down in a jet plane with an acceleration of 9.8m/s2 will become
- A. Double
- B. Half
- C. Negative
- D. Zero
Explanation: Weight of pilot = Original Weight + Apparent Weight = mg+(-ma) a= 9.8ms-2 So weight of pilot = 0
Correct answer: Zero- A. g = 0
- B. No force acts on it
- C. Its motion is free fall
- D. It is far away from the earth
Explanation: The correct answer is that an object in a satellite orbiting around the Earth is weightless because its motion is in free fall.
Correct answer: Its motion is free fall- A. 10 m/sec
- B. 36 m/sec
- C. 40 m/sec
- D. 45 m/sec
Explanation: To solve the problem, we first calculate the gravitational potential energy (PE) of the object when it is released from a height of 8 m.
Correct answer: 10 m/sec- A. 10 J
- B. 1 J
- C. 0 J
- D. 5 J
Explanation: To calculate work done, the formula is Work = Force × Displacement × cos(θ), where θ is the angle between the force and displacement…
Correct answer: 0 J- A. Negative
- B. Positive
- C. Zero
- D. Maximum and positive
Explanation: When the body moves against the force of friction on a horizontal plane, the work done by the body is negative.
Correct answer: Negative13893. Resistive forces are;
- A. Nonconservative
- B. Conservative
- C. Both conservative and nonconservative
- D. None of the above
Explanation: Non-conservative forces are those that do work on an object, resulting in dissipation or loss of energy.
Correct answer: Nonconservative- A. Negative
- B. Positive
- C. Zero
- D. All of the above
Explanation: When a person pulls their friend in the opposite direction of the bicycle's motion, the work done by them is negative.
Correct answer: Negative- A. Each point on the curve
- B. Slope of the curve
- C. Area under the curve
- D. None is true
Explanation: This is the correct option. The work done is equal to the area under the curve on a force-displacement graph.
Correct answer: Area under the curve- A. 120 J
- B. 100 J
- C. 1000 J
- D. 1200 J
Explanation: The work done on an object when it is lifted can be calculated using the formula: Work = Weight x Height.
Correct answer: 1200 J13897. Hook's law correlates the:
- A. Force and displacement
- B. Force and extension
- C. Force and compression
- D. Stress and strain
Explanation: Hooke's Law is a principle of physics that states the strain in a solid is proportional to the applied stress within the elastic limit of…
Correct answer: Stress and strain- A. 1/1
- B. 1
- C. 2
- D. 4
Explanation: Since the wires at made of the same material, their young modulus will be the same hence they have the same length, force and area.
Correct answer: 1/1- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The shear modulus of elasticity/rigidity G is a material's ability to resist deformation, it is defined as the ratio of tangential stress…
Correct answer: Option C13900. Which one of the following physical quantity does not have the dimension of force per unit area:
- A. Stress
- B. Strain
- C. Young modulus
- D. Pressure
Explanation: The strain unit is dimensionless. It is the ratio between the length shift and the initial length, so it is unit-less.
Correct answer: Strain