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NEET 2012
Exam
NEET
Year
2012
Subject
Physics
Chapter
Electromagnetic Induction

NEET 2012 · Physics · Electromagnetic Induction

In a coil of resistance 10 , the induced current developed by...

In a coil of resistance 10Ω10 \Omega, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is In a coil of resistance 10 , the induced current developed by changing magnetic flux through it, is shown in figure as

Options

  1. A8
  2. B2
  3. C6
  4. D4

Correct answer

B. 2

Step-by-step solution

I=∣1Rdϕdt∣∣dϕ∣=∣IRdt∣dϕ=( area of  triangle )\timesR=(12×4×0.1)×10=2 Wb\begin{aligned}I & =\left|\frac{1}{R} \frac{d \phi}{d t}\right|\\ |d \phi| & =|I R d t| \\ d \phi & =(\text{ area\text{ of } triangle }) \timesR \\ & =\left(\frac{1}{2} \times4 \times0.1\right) \times10=2 \mathrm{~Wb} \end{aligned}$$
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