More than One

1.Electric field intensity at a point depends upon
a)Field Charge b) Test charge c) Permittivity of medium d) (Distance between point & test charge

2. Rydberg is used as unit of
a) Wave no. b) Wave length c) Energy in atomic physics d) (Angular momentum

3. In LED
a) doping level is high b) (Light is emitted due to recombination c) Gallium arsenide is used d)
Germenium & sillicon are used

4 Answers

2) a
1) a,c,d whats option a for 1?

1-a,c,d
2-a
3 a,c

In q 3 option b should be also be right.
light is emitted by recombination of electrons and holes.

In 1st test charge is the unit charge

Field charge is q which v use in eqn

√ √ || {} [] () → ~ ^ 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