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Physics | AP Board | Grade 12 | 2014
Q. Current in a circuit falls from 5.0A to 0.0A in 0.1sec. If an average emf of 200V is induced, give an estimate of the self-inductance of the circuit.
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Q. State and explain Coulomb's inverse square law in electricity.
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Q. What is the Doppler effect? Obtain the expression for the apparent frequency of sound heard when the source is in motion with respect to an observer at rest.
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Q. State and explain Biot-Savart Law.
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Q. Explain how do you convert a moving coil galvanometer into an ammeter?
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Q. Does the principle of conservation of energy hold for interference and diffraction phenomena? Explain briefly.
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Q. What are the limitations of Bohr's theory of a hydrogen atom?
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Q. What is the photoelectric effect?
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Q. A bar magnet of length 0.1m and with a magnetic moment of 5Am2 is placed in a uniform magnetic field of intensity 0.4T, with its axis making an angle of 60o with the field. What is the torque on the magnet?
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Q. Why are microwaves used in radars?
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Q. State Kirchhoff's law for an electrical network. Using these laws, deduce the condition for balance in a Wheatstone bridge.
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Q. A wire of resistance 4R is bent in the form of a circle. What is the effective resistance between the ends of the diameter?
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Q. Why does the sun appear red during sunset and sunrise?
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Q. Derive the expression for the capacitance of a parallel plate capacitor.
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Q. State Heisenberg's uncertainty principle.
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