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What do you understand by the statement, "Electromagnetic waves transport momentum"?
Concept: Electromagnetic Spectrum
Draw a necessary arrangement for winding of primary and secondary coils in a step-up transformer. State its underlying principle and derive the relation between the primary and secondary voltages in terms of number of primary and secondary turns. Mention the two basic assumptions used in obtaining the above relation.
Concept: Inductance >> Mutual Inductance
Why does an unpolarised light incident on a polaroid get linearly polarised ?
Concept: Polarisation
Draw graphs showing variation of photoelectric current with applied voltage for two incident radiations of equal frequency and different intensities. Mark the graph for the radiation of higher intensity.
Concept: Experimental Study of Photoelectric Effect
Draw a circuit diagram of a transistor amplifier in CE configuration.
Concept: Junction Transistor >> Transistor as an Amplifier (Ce-configuration)
Write S.I unit of electric flux.
Concept: Electric Flux
Derive an expression for the mutual inductance of two long co-axial solenoids of same length wound one over the other,
Concept: Solenoid and the Toroid - the Solenoid
State the underlying principle of a cyclotron. Write briefly how this machine is used to accelerate charged particles to high energies
Concept: Cyclotron
Why is it necessary to introduce a cylindrical soft iron core inside the coil of a galvanometer?
Concept: Moving Coil Galvanometer
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
Concept: Electromagnetic Spectrum
Write two uses of the following radiation.
X-rays
Concept: Electromagnetic Spectrum
Give two reasons to explain why a reflecting telescope is preferred over a refracting telescope.
Concept: Ray Optics - Mirror Formula
Write two important limitations of a refracting telescope over a reflecting-type telescope.
Concept: Optical Instruments >> Telescope
Why are coherent sources necessary to produce a sustained interference pattern?
Concept: Coherent and Incoherent Sources and Sustained Interference of Light
With the help of a diagram, show how a plane wave is reflected from a surface. Hence, verify the law of reflection.
Concept: Reflection and Refraction of Plane Wave at Plane Surface Using Huygens' Principle >> Reflection of a Plane Wave by a Plane Surface
Define the term 'intensity of radiation' in terms of photon picture of light.
Concept: Experimental Study of Photoelectric Effect
Write Einstein’s photoelectric equation?
Concept: Einstein’s Photoelectric Equation: Energy Quantum of Radiation
Write two important limitations of Rutherford's nuclear model of the atom.
Concept: Alpha-particle Scattering and Rutherford’s Nuclear Model of Atom
Derive the mathematical expression for law of radioactive decay for a sample of a radioactive nucleus
Concept: Law of Radioactive Decay
