Physics · JEE

Least count, significant figures, Errors in measurements Short Tricks for JEE

12+ syllabus-aligned questions available

Quick answer

Short tricks for Least count, significant figures, Errors in measurements work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.

Use these Least count, significant figures, Errors in measurements shortcuts to save time in JEE Physics papers — then validate speed with 12+ MCQs on Goodmarks.

Short tricks for speed

Least count, significant figures, Errors in measurements focus drill
Solve 15 mixed MCQs for Least count, significant figures, Errors in measurements, review every explanation, and note formulas you hesitated on.
Dimensional check first
Before solving, verify each term has consistent SI dimensions — eliminates wrong options quickly in JEE MCQs.
Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.

Syllabus context

Part of Units and Measurements in JEE Main Physics.

Free sample questions

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Q1PhysicsUnit 1: Units and Measurements

The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. The total mass of the box is:

Q2PhysicsUnit 1: Units and Measurements

The mass of a ball is

1.76 k g .

The mass of 25 such balls is

Q3PhysicsUnit 1: Units and Measurements

A cube has a side of length

2.342 m

. The surface area and volume in correct significant figures are respectively:

Q4PhysicsUnit 1: Units and Measurements

The radius of a sphere is measured to be

(4.0+2.0) \mathrm{cm}

the maximum percentage error in the measurement of the volume of the sphere is

Q5PhysicsUnit 1: Units and Measurements

Two students

P

and

Q

perform an experiment to verify Ohm's law for a conductor with resistance R. They use a current source and a voltmeter with least counts of

0.1 \mathrm{mA}

and

0.1 \mathrm{mV}

respectively. The plots of the variation of voltage drop(V) across R with current(i) for both are shown. the statement which is most likely to be correct is?

Q6PhysicsUnit 1: Units and Measurements

The accuracy in the measurement of the diameter of hydrogen atom measured as

1.06 \times 10^{-10} \mathrm{m}

is :

Q7PhysicsUnit 1: Units and Measurements

Three measurement are made as

18.425 \mathrm{cm} 7.21 \mathrm{cm}

and

5.0 \mathrm{cm} .

The addition should be written as then:

Q8PhysicsUnit 1: Units and Measurements

Chlorine has

_{\text {一一一一一一詔 }}

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Frequently asked questions

Are short tricks enough for Least count, significant figures, Errors in measurements in JEE?

No — tricks complement concepts. Master the theory first, then use shortcuts in timed MCQ practice.

Short tricks for speed

Syllabus context

Free sample questions

Popular questions in Least count, significant figures, Errors in measurements

Frequently asked questions

Are short tricks enough for Least count, significant figures, Errors in measurements in JEE?

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