ECAT Physics — Oscillations
Oscillations is part of the Physics section of the UET ECAT (30 of the 100 MCQs). It breaks into 3 subtopics, and we hold 25 ECAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (3)
How Oscillations is tested
Across the 7 ECAT past papers on ParhaiKrlo, Oscillations accounts for 5 questions. It appears in 4 of them, about 1.3 questions a paper. The heaviest was ECAT Past Paper 02, with 2 questions, and the most recent is ECAT Past Paper 05, with 1.
| Paper | Questions |
|---|---|
| ECAT Past Paper 05 | 1 |
| ECAT Past Paper 03 | 1 |
| ECAT Past Paper 02 | 2 |
| ECAT Past Paper 01 | 1 |
Oscillations MCQs from the ECAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · ECAT Past Paper 05 · Oscillations
The time period of a simple pendulum at the centre of the Earth is:
- A.Zero
- B.Maximum
- C.Infinite
- D.Minimum
Show answer
Answer: C. Infinite — g = 0 at the centre of the Earth, so T = 2π√(l/g) becomes infinite: the pendulum does not oscillate.
- Q2 · ECAT Past Paper 03 · Oscillations
In a body executing (undamped) simple harmonic motion:
- A.The acceleration is constant
- B.The maximum displacement from the mean position is constant
- C.The velocity is constant
- D.The acceleration at the extreme position is zero
Show answer
Answer: B. The maximum displacement from the mean position is constant — Without damping the amplitude (maximum displacement) stays constant; acceleration and velocity keep changing.
- Q3 · ECAT Past Paper 02 · Oscillations
A body performs SHM with amplitude x₀ and angular frequency ω. Its maximum velocity is:
- A.ω²x₀
- B.ωx₀
- C.x₀/ω
- D.ωx₀²
Show answer
Answer: B. ωx₀ — v = ω√(x₀² − x²), which is largest (ωx₀) at the mean position x = 0.