Q11.An observer moves towards a stationary source of sound with a velocity one-fifth of the velocity of sound. The percentage change in the apparent frequency is (1) zero (2) 5% (3) 10% (4) 20%
What This Question Tests
This question tests the direct application of the Doppler effect formula for sound waves when an observer moves towards a stationary source.
Concepts Tested
Formulas Used
f' = f [(v + vo) / (v - vs)]
๐ NCERT Sections This Tests
4.12 โ In Exercise 4.11 Obtain The Frequency Of Revolution Of The Electron In
Physics Class 11 ยท Chapter 4
4.12 In Exercise 4.11 obtain the frequency of revolution of the electron in its circular orbit. Does the answer depend on the speed of the electron? Explain.
2.5 โ A Parallel Plate Capacitor With Air Between The Plates Has A
Physics Class 11 ยท Chapter 2
2.5 A parallel plate capacitor with air between the plates has a capacitance of 8 pF (1pF = 10โ12 F). What will be the capacitance if the distance between the plates is reduced by half, and the space between them is filled with a substance of dielectric constant 6?
2.1 โ Two Charges 5 ร 10โ8 C And โ3 ร 10โ8 C Are Located 16 Cm Apart. At
Physics Class 11 ยท Chapter 2
2.1 Two charges 5 ร 10โ8 C and โ3 ร 10โ8 C are located 16 cm apart. At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.
๐ Question Details
- Chapter
- Waves & Sound
- Topic
- Doppler effect
- Year
- 2022
- Shift
- 27 Jun Shift 1
- Q Number
- Q11
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 15: Waves
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