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

Options

(a)

0.15\mathrm{V}

and

1.6\mathrm{V}

(b)

0.05\mathrm{V}

and

1.6\mathrm{V}

(c)

0.15\mathrm{V}

and

1.8\mathrm{V}

(d)

0.05\mathrm{V}

and

1.8\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 countreadingvoltmeter

Marking Scheme

1The least count of the voltmeter is the smallest unit of measurement that can be read on the scale.
2The 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.

Analysis & 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.

Common Mistakes

1Misreading the scale
2Misinterpreting the position of the needle

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.

Spotted a mistake or something unclear?

Tell us — we fix reported answers fast.

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.