Important Questions

Chapter 1
1. What are the basic properties of electric charge?

2. State Coulomb’s law. Write its expression.
3. Derive the expression for Coulomb’s law in vector form.
4. Derive the expression for force between multiple charges.
5. What are the properties of electric field lines?
6. Draw the electric field lines for a) a positive charge b) negative charge c) two positive
charges d) two equal and opposite charges.
7. What is meant by electric flux and write its expression?
8. What is meant by a) electric dipole b) dipole moment.
9. Derive an expression for torque acting on a dipole in a uniform electric field.
10. Derive the expression for the electric field at a point on the dipole axis (axial line).
11. Derive the expression for the electric field due to a dipole at a point on the equatorial line.
12. State Gauss’s law. Derive the expression for electric field due to an infinitely long
straight uniformly charged wire.
13. State Gauss’s law. Derive the expression for electric field due to a uniformly charged
infinite plane sheet.
14. Derive the expression for electric field due to a uniformly charged spherical shell a)
inside the shell and b)outside the shell.
Chapter 2
1. What is meant by electrostatic potential? Write its expression.
2. What is meant by equipotential surface?
3. What is meant by electric flux.Write its expression.
4. Derive an expression for potential energy of the system of charges.
5. Derive the relation between electric field and potential.
6. What is meant by electrostatic shielding?
7. Derive the expression for capacitance in a parallel plate capacitor.
8. Derive the expression for effective capacitance for a) series and b) parallel connection.
9. Derive an expression for electric potential due to point charge.
10. Derive an expression for potential due to an electric dipole.
Chapter 3:
1. State Ohm’s law and write its expression.
2. Derive the relation between current and drift velocity.
3. What is meant by drift velocity?
4. What is meant by mobility and write its expression.
5. Derive the expression for σ = ne2τ/m.
6. What are the limitations of Ohm’s law?
7. How the temperature depends on resistivity in case of conductors and semiconductors.
8. Derive the expression for cells in series and parallel.
9. State Kirchhoff’s law.
10. Derive an expression for the balanced condition of the Wheatstone network.
Chapter 4
1. Write the expression for Lorent’z force?
2. Derive the expression for magnetic force on a current carrying conductor?
3. State Biot Savart’s law and write its expression.
4. Derive the expression for magnetic field in a current carrying conductor using Biot
Savart’s law.
5. Derive an expression for the magnetic field at a point on the axis of a circular loop
carrying a current.
6. State Ampere’s circuital law and write its expression.
7. Derive the expression for the magnetic field due to a straight conductor of infinite length
carrying current using Ampere’s circuital law.
8. Derive the expression for force between two parallel conductors carrying current.
9. Derive the expression for torque on a rectangular current loop in a uniform magnetic field
Chapter 5
1. Mention any two properties of magnetic field lines.
2. State and explain Gauss’s law in magnetism.
3. Define magnetization of a magnetic material. Mention its S.I unit
4. Define magnetic intensity. Give its S.I unit.
5. Differentiate between paramagnetic material and ferromagnetic material.
6. Differentiate between diamagnetic material and ferromagnetic material.
7. Differentiate between paramagnetic material and diamagnetic material.
Chapter 6
1. State Faraday’s law of electromagnetic induction and write the expression .
2. State Lenz’s law
3. Derive the expression for motional emf induced when a conductor is moving
perpendicular to the magnetic field
4. What is meant by self induction?
5. What is meant by the coefficient of self induction?
6. What is the physical significance of self induction?
7. Obtain the expression for energy stored in the coil carrying current.
8. What is meant by mutual induction?
9. What is meant by the coefficient of mutual induction?
10. Derive the expression for instantaneous emf in an ac generator.
Chapter 7
1. Derive the expression for current in case of AC applied to a pure resistor.
2. Obtain the expression for current in case of AC applied to an inductor.
3. Derive the expression for current through a capacitor when AC is applied.
4. What is resonance in an LCR series circuit? Obtain the expression for resonant
frequency of it.
5. Mention any three energy losses in a transformer.
6. Derive the expression for instantaneous current when AC voltage is applied to a pure
inductor.Draw phasor diagram for the circuit and represent it graphically.
7. Show that the instantaneous value of current is 90 degree ahead of voltage in case of
AC applied to a capacitor. Represent it graphically.
8. Derive the expression for impedance and hence the current of an RLC series circuit
connected to an AC using phasor diagram.
Chapter 8
1. Give any two uses of radio waves.
2. Write any two uses of microwaves.
3. Give any two uses of IR-waves
4. Mention any two uses of UV waves
5. Write any three properties of electromagnetic waves

Important Questions

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Chapter 1

1. What are the basic properties of electric charge?

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