Скачать или смотреть Unit 19 Electromagnetic Induction| MCQ'S & Numerical | Class 12 Physics new sindh text Jamshoro

00:00 - MCQ'S unit 19

Numerical

02:25 -1. Two coils are placed adjacent to each other, and a change in current in the first coil induces an emf of 0.5 V in the second coil. If the mutual inductance is 0.2 H, calculate the rate of change of current in the first coil. (2.5 A/s)

03:55 -2. A coil with an inductance of 0.5 H experiences a rate of change of current of 2 A/s. Calculate the induced EMF in the coil. (1 V)

05:00 -3. Two coils are placed close to each other. If a change in current of 3 A/s in the first coil induces an emf of 0.4 V in the second coil, calculate the mutual inductance. (1.33 H)

06:34 -4. A transformer has 200 turns in the primary coil and 400 turns in the secondary coil. If the primary voltage is 120 V, calculate the secondary voltage for a step-up transformer. (240 V)

08:25 -5. An inductor with an inductance of 0.2 H has a current flowing through it of 2 A. Calculate the energy stored in the inductor. (0.04 J)

09:40 -6. A coil stores energy in the form of electric potential energy of 0.2 J when it carries a current of 2 A. Calculate the inductance of the coil. (0.1 H)

11:22 -7. An AC generator produces an alternating current with a maximum voltage of 240 V. If the frequency of the generated AC is 50 Hz, calculate the peak value of the voltage. (240 V)

12:09 -8. A transformer has 1000 turns in its primary coil and 200 turns in its secondary coil. If the primary voltage is 120 V, calculate the secondary voltage for a step-down transformer. (24 V)

13:28 -9. A conductor of length 0.4 m moves at a velocity of 5 m/s perpendicular to a magnetic field of 0.3 T. Calculate the motional EMF induced in the conductor. (0.6 V)