Q31.The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is: [Given: The threshold frequency of platinum is 1 . 3 × 1015 s-1 and h = 6 . 6 × 10-34Js] (1) 8 . 58 × 10-19J (2) 9 . 76 × 10-20J (3) 3 . 21 × 10-14J (4) 6 . 24 × 10-16J
What This Question Tests
This question tests the ability to interpret transfer characteristics of a CE transistor and calculate voltage gain using input/output resistance and current gain (beta).
Concepts Tested
Formulas Used
Voltage Gain = (ΔV_out / ΔV_in) = (ΔI_c * R_out) / (ΔI_b * R_in) = β * (R_out / R_in)
📚 NCERT Sections This Tests
11.6 — The Threshold Frequency For A Certain Metal Is 3.3 × 1014 Hz. If Light
Physics Class 12 · Chapter 11
11.6 The threshold frequency for a certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 × 1014 Hz is incident on the metal, predict the cut- off voltage for the photoelectric emission.
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?
11.7 — The Work Function For A Certain Metal Is 4.2 Ev. Will This Metal Give
Physics Class 12 · Chapter 11
11.7 The work function for a certain metal is 4.2 eV. Will this metal give hotoelectric emission for incident radiation of wavelength 330 nm?
📋 Question Details
- Chapter
- Semiconductor
- Topic
- Transistor Characteristics
- Year
- 2022
- Shift
- 25 Jun Shift 2
- Q Number
- Q31
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 14: Semiconductor Electronics: Materials, Devices and Simple Circuits
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