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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACInduced Electric FieldEasy2 minPYQ_2020

PhysicsEasysingle choice

A charge flows through a $200 Ω$ galvanometer connected to a $400 Ω$ circular coil of $1000$ turns wound on a wooden stick $20 mm$ in diameter. If a magnetic field $B = 0.012 T$ parallel to the axis of the stick is decreased suddenly to zero, the charge is

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Answer:

Solution:

$q = \frac{Δ ϕ}{R}$

$q = \frac{N (B_{2} - B_{1}) A}{R} = \frac{Nπ r^{2} (B_{2} - B_{1})}{R}$

$= \frac{1000 \times π \times 10^{- 4} \times (0.012 - 0)}{(200 + 400)}$

$= 6.3$ $\times 10^{- 6} C = 6.3 μC$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Induced Electric Field

⏱ 2mℹ️ Source: PYQ_2020

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