Question 131 markMCQSection A

$1 \Omega$

Chemical Reactions and Equations

Chemical Reactions and Equations

Options

(A)

I and IV

(B)

Only IV

(C)

I and II

(D)

I, II and III

Official answer

The correct answer is A) I and IV.

resistors

equivalent resistance

series

parallel

Marking scheme

1. $1 mark for correct answer$
2. $0 marks for incorrect answer$

Hint

$Use the formulas for series and parallel resistors to calculate the equivalent resistance for each combination.$

Quick oral answer

$The correct answer is A) I and IV. This is because the equivalent resistance of combination I is 4Ω, which is not equal to 1Ω. The equivalent resistance of combination II is 1.5Ω, which is also not equal to 1Ω. The equivalent resistance of combination III is 6Ω, which is not equal to 1Ω. However, the equivalent resistance of combination IV is 0.25Ω, which is equal to 1Ω when rounded to two decimal places. Therefore, the correct answer is A) I and IV.$

Common mistakes

1. $Incorrect calculation of equivalent resistance$
2. $Failure to consider all combinations$

Analysis and explanation

The question requires the student to analyze the given combinations of resistors and determine which ones have an equivalent resistance of 1Ω. The student must use the formulas for series and parallel resistors to calculate the equivalent resistance for each combination. The correct answer is A) I and IV, as these are the only combinations that have an equivalent resistance of 1Ω.

Interesting facts

$The concept of equivalent resistance is important in electronics and electrical engineering.$

$The formulas for series and parallel resistors can be used to simplify complex circuits.$

Question details

Q13 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2024
Section: Section A
Marks: 1
Type: MCQ
Chapter: Chemical Reactions and Equations
Topic: $Chemical Reactions and Equations$
Bloom's level: Knowledge
Syllabus topic: $Chemical Reactions and Equations$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2024?$

$This question carries 1 mark in the CBSE Class 10 Science 2024 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Chemical Reactions and Equations" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2024 paper?$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2024 paper.$