Free Waves MCQs with Answers
1,281 Waves MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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1,281 questions · page 22 of 65
- A. 1 : 15
- B. 15 : 1
- C. 1 : 60
- D. 60 : 1
Explanation: Option C is correct.We know that :ws=2π/60 ,wm=2π/3600(Minute hand complete 1 revolution in 1 hour)wm /ws =2π/3600 \2π/60 =60/3600 =1/60…
Correct answer: 1 : 60- A. Equal
- B. In the ratio of 2: 1
- C. In the ratio of √2 : 1
- D. In the ratio of 4 : 1
Explanation: Explanation is given below. Acceleration formula is v^2/r
Correct answer: Equal- A. slides into the inside of the curve
- B. slides off to the outside of the curve
- C. makes the turn
- D. Makes the turn only if it goes faster
Explanation: To move in the circular path the required centripetal force must be provided by any source.
Correct answer: slides off to the outside of the curve424. When a wheel, 1 m in diameter makes 30 rev min-1, the linear speed of point on its rim in ms-1 is:
- A. 2π
- B. π
- C. π/2
- D. 20π
Explanation: v = rω = (1/2)(30×2π/60) = π/2 m/s (r = d/2 = 1/2 m).
Correct answer: π/2- A. The centripetal force upon him is less than limiting friction
- B. The centripetal force upon him is greater than limiting friction
- C. The centripetal force upon him is equal to the limiting friction
- D. The friction betsseen the tyres of the cycle and road vanishes
Explanation: To move in the circular path the required centripetal force must be provided by any source.
Correct answer: The centripetal force upon him is greater than limiting friction- A. F = ma
- B. τ = 1α
- C. F = ∆P/∆t
- D. All of above
Explanation: The analogous of Newton's 2nd law in angular motion is τ= 1α
Correct answer: τ = 1α- A. A force that is tangent to the path.
- B. An acceleration tangent to the path
- C. A force of constant magnitude that is always directed away from the same fixed point
- D. A force of constant magnitude that is always directed toward the same fixed point
Explanation: The force which is needed to move a body in a circular path and it is always directed towards the centre of the circle, is called…
Correct answer: A force of constant magnitude that is always directed toward the same fixed point- A. 2.4 x 10^-2 N
- B. 1.4π x 10-2 N
- C. 1.4 x 10^-2 N
- D. 2.4π2 x 10^-2 N
Explanation: Fc = mv2/r = (0.04)(0.6)2/1 = 144/10000 = 1.4 x 10-2N
Correct answer: 1.4 x 10^-2 N- A. its acceleration and velocity are always in the same direction
- B. its acceleration is toward the Earth
- C. its velocity is constant
- D. it will fall back to Earth when its fuel is used up
Explanation: Artificial satellites are put into their orbits by rockets and are held in orbits by the gravitational pull of the Earth.
Correct answer: its acceleration is toward the Earth- A. each point on its rim moves with constant velocity
- B. each point on its rim moves with constant acceleration
- C. the wheel turns through equal angles in equal times
- D. the angle through which the wheel turns in each second increases as time goes on
Explanation: If a body covers equal angular displacement in equal time intervals, then it is said to be in uniform angular velocity.
Correct answer: the wheel turns through equal angles in equal times- A. Clockwise about an axis that is perpendicular to the page
- B. Counterclockwise about an axis that is perpendicular to the page
- C. About an axis that is parallel to the page
- D. About an axis that is changing orientation
Explanation: If we grasp the axis of rotation in our right hand such that the fingers are curled in the direction of rotation.
Correct answer: Counterclockwise about an axis that is perpendicular to the page- A. 10π m/s2
- B. 500π m/s2
- C. 0.50 m/s2
- D. 10π2 m/s2
Explanation: ac=rw2 =0.10(5×2π)2 =0.10×100π2 = 10π2m/s
Correct answer: 10π2 m/s2- A. applied tangentially halfway between the axis and the rim
- B. applied tangentially at the rim
- C. applied radially halfway between the axis and the rim
- D. applied radially at the rim
Explanation: τ = lα rF = lα α = rF/l Torque produces the angular acceleration in the body.
Correct answer: applied tangentially at the rim- A. angular momentum
- B. total linear momentum
- C. Angular acceleration
- D. Kinetic energy
Explanation: Two equal but opposite forces at different line of action form a couple.
Correct answer: total linear momentum- A. twice the angular velocity of wheel 1
- B. the same as the angular velocity of wheel 1
- C. half the angular velocity of wheel 1
- D. more than twice the angular velocity of wheel 1
Explanation: As two wheels roll side-by-side only ifv1 = v2r1ω1 = r2ω2r1ω1 = (2r1)ω2ω2 = ω1/2
Correct answer: half the angular velocity of wheel 1- A. 1 rad
- B. π rad
- C. 53.7o
- D. All of these
Explanation: The angular displacement traced by the body is said to be one radian when the arc length is equal to the radius of the circle.< AOB =…
Correct answer: π rad- A. Slightly less
- B. Zero
- C. Slightly greater
- D. Maximum
Explanation: At centre of Earth g = 0 w = mg = m (0) = 0
Correct answer: Zero- A. Tangential acceleration
- B. Angular acceleration
- C. Radial acceleration
- D. Rotational acceleration
Explanation: This acceleration is directed along the radius towards the centre of circle. So it is also known as radial acceleration.
Correct answer: Radial acceleration- A. π/6 rad s-1
- B. π/20 rad s-1
- C. π/15 rad s-1
- D. π/30 rad s-1
Explanation: 1 rev /min = 1 x 2π/60 rad/s = π/30 rad/s
Correct answer: π/30 rad s-1- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Relation between linear and angular velocity in vector form is v = ω × r
Correct answer: Option A