### Archives

- Define electric current.
- Define drift velocity.
- Define relaxation time
- Define mean free path of electron in a conductor.
- State Ohm’s law.
- Write the mathematical form of Ohm’s law.
- Define resistance.
- Define resistivity or specific resistance.
- Define conductance
- Define mobility.
- Write the microscopic form of ohm’s law.
- What is a resistor
- Define temperature coefficient of resistance.
- State the law of series combination of resistors.
- State the law of parallel combination of resistors
- Calculate the ratio of effective resistance of the combination of 3 identical resistors in series combination to that in parallel combination.
- Why house hold appliances are connected in parallel?
- What are ohmic conductors?
- What are non ohmic conductors? Give example
- Draw the VI graph for an ohmic and a non ohmic conductor.
- Why metals are good conductors of electricity?
- How does the resistance and resistivity of a metallic conductor vary with temperature?
- Write the color code of a carbon resistor of resistance 23 kilo ohm
- A carbon resistor is coded with Blue, Green, Red and Gold colored rings. What is its resistance with tolerance?
- What do you mean by tolerance in color coding of resistance?

(To be continued)

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