CHAPTER-12 ELECTRICITY
VERY SHORT ANSWER QUESTIONS
CARRYING 1 MARK WITH ANSWER
Q1: What is represented by joule/coulomb?
Answer: It represents potential difference.
Q2: A charge of 2C moves between two plates, maintained at a p.d of 1V. What is the energy acquired by the charge?
Answer: W=QV=2×1=2J
Q3: Why are copper wires used as connecting wires?
Answer: The electrical resistivity of copper is low
Q4: A wire of resistivity 10 ohm meter is stretched to double its length. What is its new resistivity?
Answer: It remains same because resistivity depends on nature of material.
Q5: What is the resistance of connecting wire?
Answer: The resistance of a connecting wire, which is made of good conductor, is negligible.