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प्रश्न
What is meant by resistance of a conductor ? Define its SI unit.
उत्तर
Resistance is the quality of a conductor that causes it to resist the flow of an electric current through it. It is the proportion of the potential difference between ends to the current flowing. It has a Sl unit of ohm (Ω).
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संबंधित प्रश्न
What will be the change in the current if the potential difference is kept constant and the resistance of the circuit is made four times?
- It will remain unchanged.
- It will become four times.
- It will become one-fourth.
- It will become half.
Name the unit of electrical resistance and give its symbol.
Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.
- 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) ?
State the limitations of Ohm’s law.
Ohm’s law states the relationship between power and voltage.
Define temperature coefficient of resistance.
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?
Which of the following is correct for V-I graph of a good conductor?
The temperature of a conductor is increased. The graph best showing the variation of its resistance is:
