Advertisements
Advertisements
प्रश्न
Name the unit of electrical resistance and give its symbol.
उत्तर
The SI unit of electrical resistance is ohm and its symbol is Ω.
APPEARS IN
संबंधित प्रश्न
Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
In a conductor 6.25 × `10^16` electrons flow from its end A to B in 2 s. Find the current flowing through the conductor (e = 1.6 × `10^-19` C)
A wire of resistance 9 ohm having length 30 cm is tripled on itself. What is its new resistance?
- 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) ?
Define ampere and volt with respect to Ohm’s law.
What is non-ohmic resistor?
Answer the following question.
Distinguish between Ohmic and non-ohmic substances; explain with the help of example.
A wire connected to a power supply of 230 V has power dissipation P1. Suppose the wire is cut into two equal pieces and connected parallel to the same power supply. In this case, power dissipation is P2. The ratio of `"P"_2/"P"_1` is
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
How is electric current related to the potential difference across the terminals of a conductor?
Draw a labelled circuit diagram to verify this relationship.
