Q60.A metal surface is exposed to 500 nm radiation. The threshold frequency of the metal for photoelectric current is 4. 3 × 1014 Hz . The velocity of ejected electron is ___ × 105 ms−1 (Nearest integer) [Use : h = 6. 63 × 10−34 Js, me = 9. 0 × 10−31 kg] p and q are roots of the equation : + = + i)100 299(p iq), then
What This Question Tests
This question applies the Nernst equation to calculate the cell potential of a galvanic cell under non-standard conditions, given electrode potentials and ion concentrations.
Concepts Tested
Formulas Used
E_cell = E⁰_cell - (0.059/n) log(Q)
📚 NCERT Sections This Tests
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?
11.6 — 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.
11.2 — 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?
📋 Question Details
- Chapter
- Electrochemistry
- Topic
- Nernst equation
- Year
- 2021
- Shift
- 26 Aug Shift 2
- Q Number
- Q60
- Type
- Numerical
- NCERT Ref
- Class 12 Chemistry Ch 3: Electrochemistry
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