Two wires A and B of same material, having same lengths and diameters and respectively, are connected one by one in a circuit. Which one of these two wires will offer more resistance to the flow of current in the circuit? Justify your answer.
Two wires A and B of same material, having same lengths and diameters and respectively, are connected one by one in a circuit. Which one of these two wires will offer more resistance to the flow of current in the circuit? Justify your answer.
Official answer
The wire with the smaller diameter will offer more resistance to the flow of current in the circuit.
Marking scheme
- 1.2 marks
Hint
Use the formula R = ρ L/A to calculate the resistance of the wires.
Quick oral answer
The wire with the smaller diameter will offer more resistance to the flow of current in the circuit.
Common mistakes
- 1.None
Analysis and explanation
The resistance of a wire depends on its cross-sectional area, which in turn depends on its diameter. The smaller the diameter, the smaller the cross-sectional area and the higher the resistance.
Interesting facts
The resistance of a wire is inversely proportional to the square of its diameter.
Question details
Q26 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2024
- Section
- Section B
- Marks
- 2
- Type
- Very Short Answer
- Chapter
- Electricity
- Topic
- Electricity
- Bloom's level
- Remembering
- Syllabus topic
- Electricity
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2024?
This question carries 2 marks in the CBSE Class 10 Science 2024 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Electricity" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Electricity" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2024 paper?
This is a Very Short Answer question from Section B in the CBSE Class 10 Science 2024 paper.