Let the resistance of an electrical device remain constant, while the potential difference across its two ends decreases to one fourth of its initial value. What change will occur in the current through it? State the law which helps us in solving the above stated question.
Let the resistance of an electrical device remain constant, while the potential difference across its two ends decreases to one fourth of its initial value. What change will occur in the current through it? State the law which helps us in solving the above stated question.
Official answer
According to Ohm's law, V = IR. If the potential difference V decreases to one fourth of its initial value, the current I will also decrease to one fourth of its initial value, provided the resistance R remains constant.
Marking scheme
- 1./2 for stating Ohm's law
- 2./1 for explaining the change in current
Hint
Use Ohm's law to relate the potential difference and current.
Quick oral answer
According to Ohm's law, if the potential difference decreases to one fourth, the current will also decrease to one fourth, provided the resistance remains constant.
Common mistakes
- 1.Forgetting to consider the constant resistance
- 2.Incorrectly applying Ohm's law
Analysis and explanation
Ohm's law states that the potential difference V across a conductor is directly proportional to the current I flowing through it, provided the resistance R remains constant. If the potential difference V decreases to one fourth of its initial value, the current I will also decrease to one fourth of its initial value.
Interesting facts
Ohm's law is a fundamental principle in electricity
It helps us understand the relationship between potential difference and current
Question details
Q24 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2023
- Section
- Section Section B
- Marks
- 2
- Type
- Very Short Answer
- Chapter
- Electricity
- Topic
- Electric Current and Circuit
- Bloom's level
- Remembering
- Syllabus topic
- Electric Current, Electric Circuit, Resistance
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 2 marks in the CBSE Class 10 Science 2023 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 "Electric Current and Circuit" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a Very Short Answer question from Section Section B in the CBSE Class 10 Science 2023 paper.