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Q.Two small spheres each of mass 'm' kg are suspended and charge q coulomb are suspended from a point by insulating threads each of L metre length,but of negligible mass.If @ is the angle which each string makes with the vertical when equilibrium has been reached ,show that
q²=4mg L² sin²@ tan@(4 pie E_o).
Please show diagram also.

#Physics #Electricity and magnetism

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6 Answers

1

MATRIX ·2009-05-23 07:32:35

[46]........................

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MATRIX ·2009-05-23 07:33:23

[165]

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Samarth Kashyap ·2009-05-23 07:35:40

apply lami's theorem and u shud get it..

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Samarth Kashyap ·2009-05-23 07:39:48

Tcos Î± =mg............................(1)
TsinÎ±=kq²/x²

T=kq²/(x²sinÎ±)
subs in (1) and put x/2=l sinÎ±

hence proved

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Abhishek Priyam ·2009-05-23 07:45:39

Tcosa=mg

T=mg/cosa

Tsina=qE

mgtana=qE ..(i)

E=Kq²/x²
x/2=lsina

put value of E and x in (i)

you will get the answer.

we both typed at same time..

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MATRIX ·2009-05-23 07:51:13

[134]..............

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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