Magnetic Effect of Current Theoretical Important Questions in Physics for Class-XII Pdf Download

Chapter 4: Moving Charges And Magnetism


  • Concepts of magnetic field
  • Operated’s Experiment
  • Biot- Savart Law and its applications.
  • Ampere’s Law and its applications to infinitely long straight wire
  • Straight and toroidal solenoids.
  • Force on a moving Charge in uniform magnetic and electric field.
  • Cyclotron
  • Force on a current Carrying Conductor in a uniform magnetic field.
  • Force between two parallel current Carrying Conductor
  • Definition Of Ampere.
  • Torque experienced by a current loop In uniform magnetic field.
  • Moving coil galvanometer- its current sensitivity and conversion to ammeter and voltmeter.

 Magnetic Effect of Current: 


1. State Biot- Savart law and apply it to find the magnetic field due to a circular loop

carrying current at a point (a) at its Centre (b) on the axis

2. State Ampere's circuital law and apply it to find the magnetic field (a) inside a current

carrying solenoid (b) inside a current carrying toroid

3. Apply Ampere's circuital law to determine the magnetic field at a point due to a long

straight current carrying conductor.

4. Derive an expression for the force on a current carrying conductor in a uniform magnetic

field

5. Derive an expression for the force between long straight conductors carrying current

and hence define 1 ampere.

6. Derive an expression for the torque on a current carrying loop in a uniform magnetic

field.

7. Describe the principle construction and working of a Moving coil galvanometer.

8. Describe the conversion of a moving coil galvanometer into (a) Ammeter (b) Voltmeter

9. What is radial magnetic field? What is its importance in a moving coil galvanometer?

How is a radial magnetic field realized in moving coil galvanometers?

10. Describe the principle construction and working of a cyclotron. Explain why an electron

cannot be accelerated using a cyclotron.

11. Describe the motion of a charged particle in a magnetic field when it enters the field (a)

perpendicular to the field lines (b) obliquely making and angle Ɵ with the field lines

12. Derive an expression for the magnetic dipole moment of a revolving electron and hence

13. define Bohr’s magneton.

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