Advertisements
Advertisements
प्रश्न
Which of the following is an ohmic resistance?
पर्याय
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
Graph showing the variation of current versus voltage for a material Ga As is shown in the figure. Identify the region of
(i) negative resistance
(ii) where Ohm's law is obeyed.
Write the formula of resistivity
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)
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
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?
In the circuit shown in the figure, find the total resistance of the circuit and the current in the arm AD.
Define temperature coefficient of resistance.
Explain the equivalent resistance of a series resistor network.
A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?
Two cells of same emf E but internal resistance r1 and r2 are connected in series to an external resistor R (Figure). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero.
