2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Electro Magnetic Induction

JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Faraday's and Lenz's Law

  • question_answer
    A circular coil of 500 turns of wire has an enclosed area of \[0.1\,{{m}^{2}}\] per turn. It is kept perpendicular to a magnetic field of induction 0.2 T and rotated by 180° about a diameter perpendicular to the field in 0.1 sec. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of 50 ohms                    [MP PET 1997]

    A)            0.2 C                                        

    B)            0.4 C

    C)            2 C 

    D)            4 C

    Correct Answer: B

    Solution :

                       \[\Delta Q=\frac{NBA}{R}\left( \cos {{\theta }_{1}}-\cos {{\theta }_{2}} \right)\]            \[=\frac{500\times 0.2\times 0.1\left( \cos 0-\cos 180 \right)}{50}=0.4\ C\]


You need to login to perform this action.
You will be redirected in 3 sec spinner