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 690 of 697
- A. 1:1
- B. Square root of 3 :1
- C. 3:1
- D. 9:1
Explanation: To move in a circular orbit, gravitational force provides centripetal force.
Correct answer: Square root of 3 :1- A. 0°
- B. 60°
- C. 90°
- D. 180°
Explanation: 90°: If the angle between A→ and B→ is 90°, the dot product A→ · B→ would be |A→| |B→| cos(90°) = 0.
Correct answer: 90°- A. Zero
- B. 30
- C. 60
- D. 90
Explanation: In this case dot product is equal to scalar product of two vector A.B= A x B x cos θ In this case on right hand side of equation, ½ will…
Correct answer: 60- A. Cosθ
- B. A.B/B
- C. A.B/A
- D. Sinθ
Explanation: When we talk about the scalar projection of vector B onto vector A, we're looking at the component of vector B that lies in the same…
Correct answer: A.B/A- A. Large
- B. Small
- C. Maximum
- D. Zero
Explanation: If we consider a pendulum, we can see simple harmonic motion in it. According to the formula T = 2π √L/g , where L is the length of the…
Correct answer: Small- A. At the poles of the Earth
- B. At the equator of the Earth
- C. Anywhere on the surface of the Earth
- D. None of these
Explanation: The value of "g" is lowest at the equator. As T = 2π √L/g, so the Time period will be maximum hence the it would take more time to…
Correct answer: At the equator of the Earth- A. 0.008m/s
- B. 0.314m/s
- C. 0.125m/s
- D. 0.05m/s
Explanation: To determine the maximum speed of a particle in simple harmonic motion with an amplitude of 0.02 m and frequency of 2.5 Hz, we can use the…
Correct answer: 0.314m/s- A. Its length is doubled
- B. The mass of the bob is double
- C. Its length is made four time
- D. The mass and length of the pendulum is made two times
Explanation: The correct option is C Its length is made four times T = 2π√l/g⇒T∝√l , When length will be four times then,T =√4 =2 According to this…
Correct answer: Its length is made four time- A. 2.5 m
- B. 0.25 m
- C. 25 m
- D. 0.025 m
Explanation: The length of a simple pendulum can be calculated using the formula:L = gT² / 4π²Where 'L' is the length of the pendulum, 'g' is the…
Correct answer: 0.25 m13790. If a tunnel is bored through the center of the earth and a stone is dropped into it, then the
- A. stone will stop at the centre of the earth
- B. stone will move out from the other side of the tunnel
- C. stone will perform simple harmonic motion
- D. none of these
Explanation: If a tunnel is bored through the center of the Earth and a stone is dropped into it, the stone will experience the gravitational force…
Correct answer: stone will perform simple harmonic motion- A. Phase angle
- B. Angular frequency
- C. Path difference
- D. Amplitude
Explanation: Amplitude specifies displacement and direction of SHM.
Correct answer: Amplitude- A. length of the pendulum
- B. time period of vibration of pendulum
- C. mass of the bob of pendulum
- D. value of 'g'
Explanation: Periodic force depends only on the length of a simple pendulum.
Correct answer: length of the pendulum- A. increased
- B. decreased
- C. the same
- D. halved
Explanation: The time period T of a spring-mass system is given by the formula T = 2π√(m/k), where m is the mass and k is the spring constant.
Correct answer: increased- A. Beats
- B. Interference
- C. Resonance
- D. Standing waves
Explanation: MRI, or Magnetic Resonance Imaging, operates on the principle of resonance.
Correct answer: Resonance13795. If a hole is bored through the center of the earth and a pebble is dropped in it, then it will:
- A. Stop at the center of the earth
- B. Drop to the other side
- C. Execute SHM
- D. None of the above.
Explanation: The pebble would fall down to the other side and in a ideal situation would oscillate between the two ends in simple harmonic motion.
Correct answer: Execute SHM- A. π/10s
- B. π/5s
- C. π/4s
- D. π/2s
Explanation: x=10sin4t , period T=?We know that x=x°sinθ x= x°sin wtx=x° sin2πftComparing10sin4t= x° sin2πft4=2πf4=2π/TT=2π/4T=π/2 sec ans
Correct answer: π/2s- A. Inversely proportional to the square of the amplitude
- B. Directly proportional to the amplitude
- C. Zero
- D. Directly proportional to the square of the amplitude
Explanation: In simple harmonic motion (S.H.M.), the total energy is a constant sum of kinetic and potential energies, and is given by the formula E =…
Correct answer: Directly proportional to the square of the amplitude- A. T
- B. 1
- C. 2T
- D. T/2
Explanation: The period of a simple harmonic oscillator, such as a weight on an ideal spring, is given by the formula T = 2π√(m/k), where m is the mass…
Correct answer: T- A. 16 sec
- B. 12 sec
- C. 8 sec
- D. 4 sec
Explanation: The formula for the period of a simple pendulum is T = 2π √(l/g). The period is directly proportional to the square root of the length.
Correct answer: 4 sec- A. Zero
- B. ±A/2
- C. ±A/√2
- D. 2A
Explanation: When the potential energy is equal to the kinetic energy, we have:(1/2)kx^2 = (1/2)mv^2x^2 = (mv^2)/kv^2 = kx^2/mSubstituting v^2 into the…
Correct answer: ±A/√2