Q14.An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer? (speed of light = 3 × 108 m s-1) (1) 15 . 3 GHz (2) 10 . 1 GHz (3) 12 . 1 GHz (4) 17 . 3 GHz
What This Question Tests
This question requires deriving the time dependence of kinetic energy for an object in SHM, especially when starting from equilibrium, and identifying its correct graphical representation.
Concepts Tested
Formulas Used
x = A sin(ωt)
v = Aω cos(ωt)
KE = 1/2 mv²
cos²θ = (1+cos(2θ))/2
📚 NCERT Sections This Tests
14.4 — The Speed Of A Travelling
Physics Class 12 · Chapter 14
14.4 The speed of a travelling a circle. If you continue dropping pebbles in the pond, you wave see circles rapidly moving outward from the point where the
11.2 — The Work Function Of Caesium Metal Is 2.14 Ev. When Light Of
Physics Class 12 · Chapter 11
11.2 The work function of caesium metal is 2.14 eV. When light of frequency 6 ×1014Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic energy of the emitted electrons, (b) Stopping potential, and (c) maximum speed of the emitted photoelectrons?
11.8 — Light Of Frequency 7.21 × 1014 Hz Is Incident On A Metal Surface.
Physics Class 12 · Chapter 11
11.8 Light of frequency 7.21 × 1014 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 105 m/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?
📋 Question Details
- Chapter
- SHM
- Topic
- Kinetic energy in SHM
- Year
- 2017
- Shift
- 02 Apr
- Q Number
- Q14
- Type
- Graph based
- NCERT Ref
- Class 11 Physics Ch 14: Oscillations
More from this Chapter
Q35.If a spring has time period T, and is cut into n equal parts, then the time period of each part will be (1) T√n (2) T/√n (3) nT (4) T
Q36.A child swinging on a swing in sitting position, stands up, then the time period of the swing will (1) increase (2) decrease (3) remains same (4) increases if the child is tall and decreases if the child is short
Q37.Length of a string tied to two rigid supports is 40 cm. Maximum length (wave length in cm ) of a stationary wave produced on it is (1) 20 (2) 80 (3) 40 (4) 120
Q1. The length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time period of the pendulum of increased length is (1) 11% (2) 21% (3) 42% (4) 10%