Advertisements
Advertisements
प्रश्न
Which of the following is an ohmic resistance?
विकल्प
LED
Junction diode
Filament of a bulb
Nichrome wire
Advertisements
उत्तर
Nichrome wire
Hint: Substances that obey Ohm's law are called Ohmic resistors.
APPEARS IN
संबंधित प्रश्न
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
The graph between V and I for a conductor is a straight line passing through the origin.
Which law is illustrated by such a graph?
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)
What length of copper wire of resistivity 1.7 × 10-8 Ω m and radius 1 mm is required so that its resistance is 2Ω?
A metal sphere is kept on an insulting stands. A negatively charged rod is brought near it, then the sphere is earthed as shown. On removing the earthing, and taking the negatively charged rod away, what will be the nature of charge on the sphere? Give reason for your answer.
Tick(✓) the correct choice in the following:
Ohm's law is applicable to
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.
Define temperature coefficient of resistance.
Write a short note on superconductors?
Explain the equivalent resistance of a parallel resistor network.
