The top 40 most frequently Important questions in Physics exams
- State and explain Biot-Savart’s law in vector form.
- Define electric dipole and dipole moment. Derive torque on dipole in electric field.
- State and explain Gauss’s law. Deduce Coulomb’s law from it.
- Calculate potential due to a point charge.
- Derive magnetic field for a solenoid.
- Distinguish between self-inductance and mutual inductance.
- Find equivalent capacitance for series-parallel capacitors.
- State and explain Faraday’s law of electromagnetic induction.
- Distinguish diamagnetic, paramagnetic, and ferromagnetic materials.
- Define capacitance and derive energy stored in a capacitor.
- State and explain Ohm’s law.
- Derive capacitance of a parallel plate capacitor.
- Explain transient response in RC circuit.
- Define current, current density, resistance, and resistivity.
- Derive force between two parallel current-carrying conductors.
- State Ampere’s law and its applications.
- Explain construction and working of moving coil galvanometer.
- Describe hysteresis curve and its significance.
- Define Lorentz force and its applications.
- Derive magnetic field along axis of circular coil.
- State Lenz’s law with examples.
- Explain Wheatstone bridge principle with diagram.
- Calculate torque on current loop in magnetic field.
- Define magnetic flux and its properties.
- Derive energy stored in magnetic field.
- Explain quantization of charge and charge conservation.
- Define electric field intensity and relation with potential.
- Derive charging/discharging equation for RL circuit.
- State Maxwell’s corkscrew rule and Fleming’s left-hand rule.
- Calculate electric field for ring of charge on its axis.
- Define electric lines of force and their properties.
- Derive relation between surface charge density and electric field intensity.
- Explain operation of an ammeter.
- Deduce Gauss’s law in the presence of a dielectric.
- Define conductance and conductivity.
- Explain Fleming’s right-hand rule.
- Define magnetic coupling coefficient and derive its expression.
- Describe equipotential surfaces.
- Explain hysteresis and eddy current losses.
- Calculate self-inductance of a coil (e.g., iron ring).
Key Insights:
- Electrostatics (35%): Gauss/Coulomb laws, capacitors, electric dipole.
- Magnetism (40%): Biot-Savart, solenoid, hysteresis, Faraday/Lenz laws.
- Circuits (25%): RC/RL transients, Ohm’s law, Wheatstone bridge.
Details NU Physics Suggestion CSE