Advertisements
Advertisements
Question
What are ohmic conductors? Give one exmaple. Draw a graph showing the current-voltage relationship for an ohmic conductor.
Solution
The conductors which obey Ohm’s law (i.e., V/I is constant) are called ohmic conductors.
Example: Silver.
A graph showing the current-voltage relationship for a ohmic conductor is shown in the figure.
APPEARS IN
RELATED QUESTIONS
What is Resistivity?
Name the unit of electrical resistance and give its symbol.
The graph between V and I for a conductor is a straight line passing through the origin.
What should remain constant in a statement of this law?
Define ampere and volt with respect to Ohm’s law.
The ratio of the potential difference to the current is known as ________.
The slope of voltage (V) versus current (I) is called:
A metal rod of length 10 cm and a rectangular cross-section of 1 cm × `1/2` cm is connected to a battery across opposite faces. The resistance will be ______.
State Ohm's Law. Represent it mathematically.
Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions.
- State what happens when switch A is connected to:
a) Position 2
b) Position 3 - Find the potential difference across each lamp when lit.
- Calculate the current.
a) in each 12 Ω lamp when lit.
b) In each 4 Ω lamp when lit.
OR - Show, with calculations, which type of lamp, 4.0 Ω or 12 Ω, has the higher power.
