The dimensional formula of the coefficient of thermal conductivity is :

1. $\left[{\mathrm{M}}^{1}{\mathrm{L}}^{1}{\mathrm{T}}^{-3}{\mathrm{K}}^{-1}\right]$

2. $\left[{\mathrm{M}}^{3}{\mathrm{L}}^{-1}{\mathrm{T}}^{-3}\mathrm{K}\right]$

3. $\left[{\mathrm{M}}^{1}{\mathrm{L}}^{-3}{\mathrm{T}}^{-1}{\mathrm{K}}^{-1}\right]$

4. $\left[{\mathrm{M}}^{1}{\mathrm{L}}^{1}{\mathrm{T}}^{-3}\mathrm{K}\right]$

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Subtopic: Dimensions |

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If L,Q,R represent inductance, charge and resistance respectively, the units of

**[This question includes concepts from 12th syllabus]**

1. $\frac{QR}{L}$ will be those of current

2. $\frac{{Q}^{2}{R}^{3}}{{L}^{2}}$ will be those of energy

3. $\frac{QL}{R}$ will be those of current

4. $\frac{{Q}^{3}{R}^{2}}{L}$ will be those of power ** **

Subtopic: Dimensions |

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The quantity $\frac{1}{2}{\in}_{0}{E}^{2}$ has dimensional formula same as **[This question includes concepts from 12th syllabus]**

1. $\frac{1}{2}C{V}^{2}$

2. $\frac{1}{2}L{I}^{2}$

3. $\frac{1}{2}\frac{{B}^{2}}{{\mu}_{0}}$

4. Power

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Subtopic: Dimensions |

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A light-year is a unit of:

1. Time

2. Mass

3. Distance

4. Energy

Subtopic: Dimensions |

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The magnitude of any physical quantity:

(1) depends on the method of measurement.

(2) does not depend on the method of measurement.

(3) is more in the SI system than in the CGS system.

(4) is directly proportional to the fundamental units of mass, length and time.

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Subtopic: Dimensions |

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Which of the following is not equal to *watt* ?

(1) *Joule*/*second*

(2) *Ampere $\times $ volt*

(3) (*Ampere*)^{2} *$\times $ *ohm

(4) *Ampere*/*volt *

Subtopic: Dimensions |

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Newton–*second* is the unit of

(1) Velocity

(2) Angular momentum

(3) Momentum

(4) Energy

Subtopic: Dimensions |

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Which of the following is not represented in correct unit

(1) $\frac{\text{Stress}}{\text{Strain}}=N\text{}/\text{}{m}^{2}$

(2) Surface tension = $N\text{}/\text{}m$

(3) Energy $=kg\text{-}m\text{}/\text{}\mathrm{sec}$

(4) Pressure $=N\text{}/\text{}{m}^{2}$

Subtopic: Dimensions |

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One *second* is equal to :

(1) 1650763.73 time periods of $Kr$ clock

(2) 652189.63 time periods of $Kr$ clock

(3) 1650763.73 time periods of $Cs$ clock

(4) 9192631770 time periods of $Cs$ clock

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Subtopic: Dimensions |

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One nanometre is equal to:

(1) ${10}^{9}mm$

(2) ${10}^{-6}\text{\hspace{0.17em}}cm$

(3) ${10}^{-7}cm$

(4) ${10}^{-9}cm$

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Subtopic: Dimensions |

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