Advertisements
Advertisements
Question
SI unit of resistance is:
Options
mho
joule
ohm
ohm meter
Advertisements
Solution
ohm
APPEARS IN
RELATED QUESTIONS
The unit of electrical resistance is:
(a) ampere
(b) volt
(c) coulomb
(d) ohm
What is the necessary condition for a conductor to obey Ohm’s law?
Two metallic spheres A and B kept on insulating stands are in contact with each other. A positively charged rod P is brought near the sphere A as shown in the figure. The two spheres are separated from each other, and the rod P is removed. What will be the nature of charges on spheres A and B?

Consider the sacle of voltmeter shown in the diagram and answer the following questions :

(a) What is the least count of the voltmeter?
(b) What is the reading shown by the voltmeter ?
(c) If the voltmeter is connected across a resistor of 20 `Omega` how much current is flowing through the resistor?
- 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 relation correlating the electric current flowing in a conductor and the voltage applied across it. Also, draw a graph to show this. relationship.
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
The resistance of a nichrome wire at 0°C is 10Ω. If its temperature coefficient of resistivity of nichrome is 0.004/ °C, find its resistance of the wire at boiling point of water. Comment on the result.
Which of the following is correct for V-I graph of a good conductor?
The variable resistance is called ____________.
