- Historical Background of Electric Charges
- Basic Properties of Charges
- Coulomb’s Law - Force Between Two Point Charges
- Electric Field and Electric Field Lines
- Electric Dipole and Its Properties
- Electrostatic Potential and Potential Energy
- Gauss Law and Its Application
- Electrostatics of Conductors and Dielectrics
- Capacitors and Capacitance
- Distribution of Charges in a Conductor and Action at Points
Magnetism and Magnetic Effects of Electric Current
- Introduction to Magnetism
- Coulomb’s Inverse Square Law of Magnetism
- Torque Acting on a Bar Magnet in Uniform Magnetic Field
- Magnetic Properties
- Classification of Magnetic Materials
- Magnetic Effects of Current
- Biot - Savart Law
- Ampere’s Circuital Law
- Lorentz Force
- Torque on a Current Loop in Magnetic Field
Electromagnetic Induction and Alternating Current
Dual Nature of Radiation and Matter
Atomic and Nuclear Physics
Electronics and Communication
- Introduction to Electronics
- Types of Semiconductors
- Bipolar Junction Transistor (BJT)
- Digital Electronics
- Boolean Algebra
- De Morgan’s Theorem
- Introduction to Communication System
- The Elements of an Electronic Communication System
- Antenna Size
- Propagation of Electromagnetic Waves
- Satellite Communication
- Fibre Optic Communication
- Radar and Applications
- Mobile Communication
- Global Positioning System
- Application of Information and Communication Technology (ICT)
Recent Developments in Physics
- Electromotive force and internal resistance
- Determination of internal resistance
- Cells in series
- Cells in parallel
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10Ω is ______.
Three identical lamps each having a resistance R are connected to the battery of emf as shown in the figure.
Suddenly the switch S is closed.
- Calculate the current in the circuit when S is open and closed.
- What happens to the intensities of the bulbs A, B and C.
- Calculate the voltage across the three bulbs when S is open and closed.
- Calculate the power delivered to the circuit when S is opened and closed.
- Does the power delivered to the circuit decrease, increase or remain same?
A cell supplies a current of 0.9 A through a 2 Ω resistor and a current of 0.3 A through a 7 Ω resistor. Calculate the internal resistance of the cell.