A dimensionless quantity

Important Questions on Physical World, Units and Measurement

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 4

Which of the following functions of $A$ and $B$ cannot be performed if $A$ and $B$ possess different dimensions?

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 5

The dimension of length is expressed as $G^{\mathrm{X}}{c}^{\mathrm{Y}}{h}^{\mathrm{Z}}$ where $G, c$ and $h$ are the universal gravitational constant, speed of light and Plank's constant respectively, then:

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 6

The equation of a stationary wave is
$y=2A\sin \left(\frac{2\pi ct}{\lambda }\right)\cos \left(\frac{2\pi x}{\lambda }\right).$
Which of the following is correct?

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 7

A dimensionless quantity $y$ is represented by the formula $y=\frac{a-bc}{d+e}.$ Which of following is/are correct?

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 8

Let $y=A\sin (\omega t-kx)$ represents the variation of displacement $y$ of a particle with time $t.$ Which of the following is not meaningful?

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 9

The radius of a spherical ball is $10.4\pm 0.4 \mathrm{cm}.$ Select the correct alternative.

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 10

A voltmeter has a least count of $0.1 \mathrm{V}$ and an ammeter has a least count of $0.1 \mathrm{A}.$ The potential drop $\mathrm{V}$ across a resistance is measured as $10.0 \mathrm{V}$ and current through it is measured as $1.0 \mathrm{A}.$ Select the correct alternative.

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 11

Planck's constant $h$, speed of light $c$ and gravitational constant $G$ are used to form a unit of length $L$ and a unit of mass $M$. Then the correct options(s) is (are)