An electric motor of 12 horse power generates an angular velocity of 22 rad/s. What will be the frequency of rotation?
Correct answer: C. 7/2
- A. 20/π
- B. 10/π
- C. 7/2
- D. 7/44
Explanation
Explanation is given below. The frequency of rotation of the electric motor can be calculated using the formula: f = ω/2π where f is the frequency of rotation, ω is the angular velocity, and 2π is the value of the constant pi. Plugging in the values given in the problem, we get: f = 22/2π f ≈ 3.5 Hz Therefore, the frequency of rotation of the electric motor is approximately 3.5 Hz.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
Practise Waves
1,281 free Waves MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Simple Harmonic Motion questions
A 5 kg mass bounces in simple harmonic motion at the end of a spring. At which point is the acceleration of the mass the greatest?
The periodic time of a simple pendulum of length 1m & amplitude 2 cm is 5 sec. If the amplitude is made 4 cm, its periodic time in sec is:
The motion of a particle is expressed by the equation: a = - bx, where x is the displacement from the equilibrium position and b is constant. What is the periodic time?
A wheel initially has an angular velocity of 18 rad/s but it is slowing at a rate of 2.0 rad/s2. By the time it stops it will have turned through:
The ratio of velocities at points A, B and C in vertical circular motion is
A small body of mass m, tied to a string and revolved in a vertical circle is just able to reach to the top of the path and complete the circle. The tension in the string at the lowest point of the path is: