Photoelectric Effect-1

JEE Mains Online › Modern physics questions › Photoelectric Effect-1

#Physics #Modern physics

UP 0 DOWN 0 0 2
Post on FacebookPost anonymously?

2 Answers

661

Gaurav Gardi ·2013-03-01 04:19:30

(B),(C)

UP 0 DOWN 3
Akash Anand Think about C option again
Upvote·0· Reply ·2013-03-01 22:18:18
Gaurav Gardi sorry i did not see it was minimum kinetic energy i thought it was maximum kinectic energy. then the answer will be only (A)
Upvote·0· Reply ·2013-03-02 21:12:44
Gaurav Gardi sorry only (B)
Upvote·0· Reply ·2013-03-04 00:42:32
Post on FacebookPost anonymously?

1057

Ketan Chandak ·2013-03-01 19:34:49

Max K.E=(1242/200)+2-4.5=3.7eV
If polarity is reversed photoelectrons won't be ejected since (1242/200) is less than effective work function(4.5+2).

Hence,(b) and (c) are correct.

UP 0 DOWN 1
Akash Anand Think about C option again
Upvote·0· Reply ·2013-03-01 22:18:24
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω