Potential Drop

JEE Mains 2015 Questions › Electricity and magnetism questions › Potential Drop

Q: The potential drop V₀ (in VOLTS) across a resistor varies as V₀ = 2 i^3/2 where ' i ' is the current in mA. Find the resistance of above device when V₀ = 16 V.

Q: A conducting sphere of radius ' a ' has charge Q on it. It is enclosed by a neutral concentric thick shell having inner radius ' 2a ' and outer radius ' 3a '. Find the Electrostatic Potential Energy of the system?

In this case I'm having problem in writing the Potential Energy of interaction among the two shells. Which distance to take?

#Physics #Electricity and magnetism

UP 0 DOWN 0 0 6
Post on FacebookPost anonymously?

6 Answers

1

jit kamdar ·2011-10-01 03:46:36

when v₀=16...i=2mA.....
so resistance=vi=162x10^-3=8x10³

UP 0 DOWN 0
Post on FacebookPost anonymously?

71

Vivek @ Born this Way ·2011-10-01 06:14:04

It isn't correct!

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Debosmit Majumder ·2011-10-01 06:22:11

1. Ans:4 x 10^3
nt sure....verify....

UP 0 DOWN 0
Post on FacebookPost anonymously?

71

Vivek @ Born this Way ·2011-10-02 01:58:15

Yes it is. ??

UP 0 DOWN 0
Post on FacebookPost anonymously?

30

Ashish Kothari ·2011-10-02 04:09:52

I guess Jit just made an incorrect calculation.

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Debosmit Majumder ·2011-10-02 04:14:14

yup...i=4mA

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