⇦ | ⇨ |
A condenser of capacity C is charged to a potential difference of V₁. The plates of the condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the potential difference across the condenser to V₂ is
Options
(a) [ C (V₁² – V₂²) / L ]¹/²
(b) [ C (V₁ – V₂)² / L ]¹/²
(c) C (V₁² – V₂²) / L
(d) C (V₁ – V₂) / L
Correct Answer:
[ C (V₁² – V₂²) / L ]¹/²
Explanation:
q = CV₁ cos wt
i = dq/ dt = – ?Cv₁ sin ?t
Also, ?ᅡᄇ = 1 / LC and V = V₁ cos ?t
At t = t₁, V = V₂ and i = – ?CV₁ sin ?t₁
cos ?t₁ = V₂ / V₁ (-ve sign gives direction)
Hence, i = V √(C/L) [ 1 – V₂² / V₁²) ]¹/²
= [ C (V₁² – V₂²) / L ]¹/²
Related Questions: - A stone thrown into still water, creates a circular wave pattern moving radially
- There is a ring of radius r having linear charge densityλ and rotating with a uniform
- The current in the windings of a toroid is 2.0 A. There are 400 turns
- A body of weight W newton is at the surface of the earth.
- When a magnet is taken towards a coil, the induced e.m.f. depends on
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A stone thrown into still water, creates a circular wave pattern moving radially
- There is a ring of radius r having linear charge densityλ and rotating with a uniform
- The current in the windings of a toroid is 2.0 A. There are 400 turns
- A body of weight W newton is at the surface of the earth.
- When a magnet is taken towards a coil, the induced e.m.f. depends on
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply