Advertisements
Advertisements
Question
- 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
Solution
-
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
RELATED QUESTIONS
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of 1 A.
The resistivity of copper = 1.7 × 10–8 Ω m
How does an increase in the temperature affect the specific resistance of a :
(i) Metal and
(ii) Semiconductor ?
Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.
What is meant by the drift speed of free electrons?
State the limitations of Ohm’s law.
Ohm’s law states the relationship between power and voltage.
An electronics hobbyist is building a radio which requires 150 Ω in her circuit, but she has only 220 Ω, 79 Ω, and 92 Ω resistors available. How can she connect the available resistors to get the desired value of resistance?
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.
Why should an ammeter have low resistance?
A current of 0.8 A flows in a conductor of 40 Ω for 1 minute. The heat produced in the conductor will be ______.
