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How are infrared waves produced?
Concept: Electromagnetic Spectrum
How are X-rays produced?
Concept: Electromagnetic Spectrum
Give any two uses of infrared waves.
Concept: Electromagnetic Spectrum
In Young's double slit experiment, plot a graph showing the variation of fringe width versus the distance of the screen from the plane of the slits keeping other parameters same. What information can one obtain from the slope of the curve?
Concept: Interference of Light Waves and Young’s Experiment
What is the effect on the fringe width if the distance between the slits is reduced keeping other parameters same?
Concept: Interference of Light Waves and Young’s Experiment
In a double-slit experiment using the light of wavelength 600 nm, the angular width of the fringe formed on a distant screen is 0.1°. Find the spacing between the two slits.
Concept: Interference of Light Waves and Young’s Experiment
Show that the angular width of the first diffraction fringe is half that of the central fringe.
Concept: Interference of Light Waves and Young’s Experiment
A plane wavefront propagating in a medium of refractive index 'μ1' is incident on a plane surface making the angle of incidence 'i' as shown in the figure. It enters into a medium of refractive index 'μ2' (μ2 > μ1). Use Huygens' construction of secondary wavelets to trace the propagation of the refracted wavefront. Hence verify Snell's law of refraction.
Concept: Refraction of a Plane Wave
Two monochromatic beams, one red and the other blue, have the same intensity. In which case (i) the number of photons per unit area per second is larger, (ii) the maximum kinetic energy of the photoelectrons is more? Justify your answer.
Concept: Photoelectric Effect - Hertz’s Observations
How does one explain, using de Broglie hypothesis, Bohr's second postulate of quantization of orbital angular momentum?
Concept: De Broglie’s Explanation of Bohr’s Second Postulate of Quantisation
Draw a plot of potential energy of a pair of nucleons as a function of their separations. Mark the regions where the nuclear force is (i) attractive and (ii) repulsive.
Concept: Nuclear Force
Describe the following term briefly:
minority carrier injection in forward biasing.
Concept: Semiconductor Diode
Describe the following term briefly:
breakdown voltage in reverse biasing
Concept: Semiconductor Diode
Write the functions of the following in communication systems:
Transmitter
Concept: Basic Terminology Used in Electronic Communication Systems
Write the functions of the following in communication systems:
Receiver
Concept: Basic Terminology Used in Electronic Communication Systems
Why did the people of China not receive the benefits of the reforms when its economy had improved dramatically? Explain giving any two reasons.
Concept: The Rise of the Chinese Economy
Explain India’s stand on environmental issues.
Concept: India's Stand on Environmental Issues
Explain any four reasons for the dominance of the Congress Party in the first three general elections in India.
Concept: Nature of Congress Dominance at the National Level
Highlight any two major problems faced by the Election Commission of India for holding the first General Election in 1952.
Concept: Challenge of Building Democracy
Analysis of any two effects of the Emergency declared in 1975 on the politics of India.
Concept: Declaration of Emergency
