back to directory
NEET PHYSICSUNITS AND MEASUREMENTSEasy

Question

Which of the following is not equal to a watt?

A

Joule/second

B

Ampere ×\times Volt

C

(Ampere)2×^2 \times Ohm

D

Ampere/Volt

Step-by-Step Solution

The watt (W) is the SI unit of power. We verify each option using standard physics formulas found in the NCERT text:

  1. Joule/second: Power is defined as the rate of doing work (P=W/tP = W/t). The unit is Joule per second (Js−1J s^{-1}), which is defined as a watt .
  2. Ampere ×\times Volt: Electrical power is given by the product of voltage and current (P=VIP = VI). The unit is Volt ×\times Ampere, which equals a watt .
  3. (Ampere)2×^2 \times Ohm: Substituting Ohm's law (V=IRV = IR) into the power equation (P=VIP = VI) gives P=I(IR)=I2RP = I(IR) = I^2R. The unit is Ampere2×^2 \times Ohm, which equals a watt .
  4. Ampere/Volt: This ratio represents I/VI/V, which is the inverse of resistance (1/R1/R). This quantity is known as conductance, and its unit is Siemens (S) or ohm−1\text{ohm}^{-1}, not watt .

Exam Context & Concepts Covered

This question aligns with the NEET PHYSICS syllabus, specifically targeting concepts from UNITS AND MEASUREMENTS. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

PHYSICSUNITS AND MEASUREMENTSfollowing

More UNITS AND MEASUREMENTS Questions

View all

In an experiment, four quantities $a$, $b$, $c$ and $d$ are measured with percentage error $1\%$, $2\%$, $3\%$ and $4\%$ respectively. Quantity $P$ is calculated as follows: $P=\frac{a^3b^2}{cd}$. Percentage error in $P$ is:

A.$10\%$
B.$7\%$
C.$4\%$
D.$14\%$
MediumSolve

Dimensional formula for volume elasticity is

A.M¹L⁻²T⁻²
B.M¹L⁻³T⁻²
C.M¹L²T⁻²
D.M¹L⁻¹T⁻²
EasySolve

The velocity $v$ of a particle at time $t$ is given by $v = at + \frac{b}{t+c}$, where $a$, $b$ and $c$ are constants. The dimensions of $a$, $b$ and $c$ are respectively:

A.$[L T^{-2}], [L]$ and $[T]$
B.$[L^2], [T]$ and $[LT^2]$
C.$[LT^2], [LT]$ and $[L]$
D.$[L], [LT]$ and $[T^2]$
MediumSolve

Which one has the dimensions different from the remaining three?

A.Power
B.Work
C.Torque
D.Energy
EasySolve

Taking into account the significant figures, what is the value of $9.99\text{ m} - 0.0099\text{ m}$?

A.$9.98\text{ m}$
B.$9.980\text{ m}$
C.$9.9\text{ m}$
D.$9.9801\text{ m}$
EasySolve

Of the following quantities, which one has dimensions different from the remaining three?

A.Energy per unit volume
B.Force per unit area
C.Product of voltage and charge per unit volume
D.Angular momentum per unit mass
MediumSolve

If the unit of length and force be increased four times, then the unit of energy is:

A.Increased 4 times
B.Increased 8 times
C.Increased 16 times
D.Decreased 16 times
EasySolve

Which of the following pairs of physical quantities has the same dimensions?

A.Work and power
B.Momentum and energy
C.Force and power
D.Work and energy
EasySolve

Why 32,000+ students choose TopperSquare

Everything you need to crack NEET

15,000+ Chapter MCQs

Physics, Chemistry, Biology — chapter-wise, topic-wise practice

AI Performance Analytics

Know your weak topics. Get a personalised study plan.

Full NEET Mock Tests

180 questions, timed, with detailed score analysis

PYQ Sets 2010–2024

15 years of past papers with solved explanations

Start Practising Free

No credit card · 30-second signup · Free forever plan included

This neet physics practice question is part of the TopperSquare free question bank. TopperSquare offers 15,000+ chapter-wise NEET MCQs across Physics, Chemistry, and Biology with detailed step-by-step explanations, full mock tests, NEET PYQs (2010–2024), and an AI-powered performance analytics dashboard. browse all neet practice questions → · practice physics sets →

Explore more subjects:Physics MCQs•Chemistry MCQs•Biology MCQs•Botany MCQs•Zoology MCQs•NEET Mock Tests•NEET PYQs