Advertisements
Advertisements
प्रश्न
- Draw a V-I graph for a conductor obeying Ohm’s law.
- What does the slope of V–I graph for a conductor represent?
Advertisements
उत्तर
-
Use the Y-axis to plot V against I, and the X-axis to plot I. As can be seen in the illustration, the graphs are determined to be straight lines. So, the ohm law is confirmed.
APPEARS IN
संबंधित प्रश्न
Keeping the p.d. constant, the resistance of a circuit is halved. The current will become:
(a) one-fourth
(b) four time
(c) half
(d) double
Fill in the following blank with suitable words:
Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .
A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. Assuming that it has a uniform cross section, what will be its new resistance?
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?
Fig. represents the circuit used for the verification of Ohm's law. Label the parts from A to F. state the function of each.
State and define Ohm’s law.
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
What is ohmic device?
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
State Ohm’s law? How can it be verified experimentally? Does it hold good under all conditions? Comment.
