very simple

IIT JEE 2015 Answers › Electricity and magnetism questions › very simple

consider two lamps with resistance R₁ and R₂ which are coneeted in parallel R₁>R₂

if the lamp of resistance R₁ now burns out, how will the illumination produced change?

will the illumination remain same
or decrease
or increase

Now if the resistors r connected in series and the lamp of resistance R₁ alone is plugged in and R₂ now burns out, how will the illumination produced change?

will the illumination remain same
or decrease
or increase

Assume dat the lighting circuit will be of negligible resistance

#Physics #Electricity and magnetism

UP 0 DOWN 0 0 5
Post on FacebookPost anonymously?

5 Answers

Lokesh Verma ·2009-01-15 04:34:04

Hint and solution!!!

Define: Illumination

UP 0 DOWN 0
Post on FacebookPost anonymously?

msp ·2009-01-15 05:14:45

for the second case after the resistor is burnt then no current will flow through the circuit and therefore the illumination will lgoes to zero...

sir correct me

UP 0 DOWN 0
Post on FacebookPost anonymously?

skygirl ·2009-01-15 05:34:26

in first case illumination will increase..

UP 0 DOWN 0
Post on FacebookPost anonymously?

Lokesh Verma ·2009-01-15 05:39:55

yes ur second part is correct :)

UP 0 DOWN 0
Post on FacebookPost anonymously?

Lokesh Verma ·2009-01-15 05:52:53

http://mysite.du.edu/~jcalvert/optics/lumens.htm

read for details..

UP 0 DOWN 0
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

Close [X]

very simple

5 Answers

Your Answer

Add Image

Similar Questions