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प्रश्न
What is meant by the drift speed of free electrons?
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उत्तर
The average minimum and maximum velocity of free electron between consecutive collisions with positive ions is called drift velocity.
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संबंधित प्रश्न
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.
Fill in the following blank with suitable words:
Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
- Name and state the law which relates the potential difference and current in a conductor.
- What is the necessary condition for a conductor to obey the law named above in part (a) ?
What is non-ohmic resistor?
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An electronics hobbyist is building a radio which requires 150 Ω in her circuit, but she has only 220 Ω, 79 Ω, and 92 Ω resistors available. How can she connect the available resistors to get the desired value of resistance?
The variable resistance is called ____________.
Assertion: The statement of Ohm’s law is K = IR.
Reason: V = IR is the equation which defines resistance.
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Draw a labelled circuit diagram to verify this relationship.
