A student plots V-I graphs for three samples of nichrome wire with resistances , and . Choose from the following the statement that holds true for this graph.
A student plots V-I graphs for three samples of nichrome wire with resistances , and . Choose from the following the statement that holds true for this graph.
Options
Official answer
R3 > R2 > R_1
Marking scheme
- 1.R_3 > R_2 > R_1
Hint
The graph shows a linear relationship between voltage and current for all three samples of nichrome wire. This indicates that the resistance of each wire is constant and independent of the voltage.
Quick oral answer
The graph shows a linear relationship between voltage and current for all three samples of nichrome wire. This indicates that the resistance of each wire is constant and independent of the voltage. The slope of the graph represents the resistance, and the steeper the slope, the higher the resistance. Therefore, the correct order of resistance is R_3 > R_2 > R_1.
Common mistakes
- 1.R_1 = R_2 = R_3
- 2.R_2 > R_1 > R_3
Analysis and explanation
The graph shows a linear relationship between voltage and current for all three samples of nichrome wire. This indicates that the resistance of each wire is constant and independent of the voltage. The slope of the graph represents the resistance, and the steeper the slope, the higher the resistance. Therefore, the correct order of resistance is R3 > R2 > R_1.
Interesting facts
Nichrome wire is a type of resistance wire made from a nickel-chromium alloy.
It is commonly used in heating elements and electrical resistors due to its high resistance and durability.
Question details
Q7 of 45 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2020
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Electricity
- Topic
- Electricity
- Bloom's level
- Comprehension
- Syllabus topic
- Electricity
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2020?
This question carries 1 mark in the CBSE Class 10 Science 2020 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 2020 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2020 paper.