Question 151 markMCQSection A

$In the following diagram, the position of the needle is shown on the scale of a voltmeter. The least count of the voltmeter and the reading shown by it respectively are:$

Chemical Reactions and Equations

Chemical Reactions and Equations

Options

(a)

0.15\mathrm{V}

(b)

0.05\mathrm{V}

(c)

0.15\mathrm{V}

(d)

0.05\mathrm{V}

Official answer

The least count of the voltmeter is the smallest unit of measurement that can be read on the scale. In this case, the least count is 0.05 V. The reading shown by the voltmeter is the value indicated by the position of the needle on the scale. In this case, the reading is 1.6 V.

least count

reading

voltmeter

Marking scheme

1. $The least count of the voltmeter is the smallest unit of measurement that can be read on the scale.$
2. $The reading shown by the voltmeter is the value indicated by the position of the needle on the scale.$

Hint

$To determine the least count of the voltmeter, look at the smallest unit of measurement on the scale. To determine the reading shown by the voltmeter, look at the position of the needle on the scale.$

Quick oral answer

$The least count of the voltmeter is the smallest unit of measurement that can be read on the scale, which is 0.05 V in this case. The reading shown by the voltmeter is the value indicated by the position of the needle on the scale, which is 1.6 V in this case.$

Common mistakes

1. $Misreading the scale$
2. $Misinterpreting the position of the needle$

Analysis and explanation

The least count of a measuring instrument is the smallest unit of measurement that can be read on the scale. In this case, the least count of the voltmeter is 0.05 V. The reading shown by the voltmeter is the value indicated by the position of the needle on the scale. In this case, the reading is 1.6 V.

Interesting facts

$The least count of a measuring instrument is an important concept in physics and engineering.$

$The reading shown by a measuring instrument can be affected by various factors such as temperature, humidity, and calibration.$

Question details

Q15 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2023
Section: Section A
Marks: 1
Type: MCQ
Chapter: Chemical Reactions and Equations
Topic: $Chemical Reactions and Equations$
Bloom's level: Remembering
Syllabus topic: $Chemical Reactions and Equations$

Spotted a mistake or something unclear?

Tell us and we will fix it.

Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2023?$

$This question carries 1 mark in the CBSE Class 10 Science 2023 examination.$

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

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

$What topic does this question cover in Science?$

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

$What type of question is this in the CBSE Class 10 Science 2023 paper?$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.$