Physics
XII
1. Filament of lamp nearly burnt out at
first. After this it continuously glow and gives light. Why?
2. What is galvanometer? How it is
converted into an ammeter and a voltmeter?
3. Why clock oil is used in Millikan’s
oil drop experiment?
4. What is role of X-Ray in Millikan’s
oil drop experiment?
5. On What factors velocity of sound in
air depends? Explain.
6. Derive an expression for torque
experienced by current carrying rectangular coil when kept in magnetic field.
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