Physics - Units Measurement - Quiz-3

In SI, Henry is the unit of

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Self inductance
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Mutual inductance
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(1) and (2) both
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None of the above

The unit of $e . m . f .$ is

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Joule
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Joule-Coulomb
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Volt–Coulomb
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Joule/Coulomb

Unit of self inductance is [This question includes concepts from 12th syllabus]

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$\frac{N e w t o n - \sec o n d}{C o u l o m b \times A m p e r e}$
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$\frac{J o u l e / C o u l o m b \times S e c o n d}{A m p e r e}$
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$\frac{V o l t \times m e t r e}{C o u l o m b}$
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$\frac{N e w t o n \times m e t r e}{A m p e r e}$

To determine Young's modulus of a wire, the formula is $Y = \frac{F}{A} \times \frac{L}{Δ L};$ where L = length, A = area of cross-section of the wire, $Δ L =$ change in length of the wire when stretched with a force F. The conversion factor to change it from CGS to MKS system is

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1
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10
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0.1
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0.01

Young's modulus of a material has the same units as

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Pressure
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Strain
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Compressibility
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Force

One yard in SI units is equal :

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(1) 9144 metre
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(2) 0.9144 metre
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(3) 0.09144 kilometre
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(4) 1.0936 kilometre

Which of the following is the smallest unit?

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Millimetre
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Angstrom
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Fermi
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Metre

Which one of the following pairs of quantities and their units is a proper match?

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Electric field – $C o u l o m b / m$
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Magnetic flux – $W e b e r$
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Power – Farad
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Capacitance – Henry

The units of modulus of rigidity are

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$N - m$
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$N / m$
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$N - m^{2}$
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$N / m^{2}$

The unit of absolute permittivity is

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$F m$ (Farad-metre)
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$F m^{- 1}$ (Farad/metre)
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$F m^{- 2}$ (Farad/ $m e t r e^{2}$ )
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F (Farad)

List-I

I. Joule

II. Watt

III. Volt

IV. Coulomb

List-II

A. Henry × Amp/sec

B. Farad × Volt

C. Coulomb × Volt

D. Oersted × cm

E. Amp × Gauss

F. Amp² × Ohm

[This question includes concepts from 12th syllabus]

Codes:

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$I - A, I I - F, I I I - E, I V - D$
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$I - C, I I - F, I I I - A, I V - B$
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$I - C, I I - F, I I I - A, I V - E$
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$I - B, I I - F, I I I - A, I V - C$

Which relation is wrong?

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1 Calorie = 4.18 Joules
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$1 Å = 10^{- 10} m$
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$1 M e V = 1 .6 \times 10^{- 13} J o u l e s$
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$1 N e w t o n = 10^{- 5} D y n e s$

If $x = a t + b t^{2}$ , where x is the distance travelled by the body in kilometres while t is the time in seconds, then the units of b are

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$k m / s$
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$k m - s$
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$k m / s^{2}$
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$k m - s^{2}$

Given the equation $(P + \frac{a}{V^{2}})$ $(V - b)$ = constant. The units of a will be (where P is pressure and V is volume)

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$D y n e \times c m^{5}$
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$D y n e \times c m^{4}$
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$D y n e / c m^{3}$
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$D y n e / c m^{2}$

Which of the following quantity is expressed as force per unit area

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Work
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Pressure
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Volume
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Area

Match the following:

List-I		List-II
(a)	Distance between earth and stars	1.	Microns
(b)	Inter-atomic distance in a solid	2.	Angstroms
(c)	Size of the nucleus	3.	Light years
(d)	Wavelength of infrared laser	4.	Fermi
		5.	Kilometres

Codes:

	a	b	c	d
(1)	5	4	2	1
(2)	3	2	4	1
(3)	5	2	4	3
(4)	3	4	1	2

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1
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2
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3
0%
4

Which is not a unit of electric field

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$N C^{- 1}$
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$V m^{- 1}$
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$J C^{- 1}$
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$J C^{- 1} m^{- 1}$

'Torr' is the unit of

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Pressure
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Volume
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Density
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Flux

Which of the following is a derived unit

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Unit of mass
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Unit of length
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Unit of time
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Unit of volume

Dyne/cm² is not a unit of :

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Pressure
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Stress
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Strain
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Young's modulus

The units of angular momentum are

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$k g - m^{2} / s^{2}$
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$J o u l e - s$
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$J o u l e / s$
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$k g - m - s^{2}$

Which of the following is not the unit of energy

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Calorie
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Joule
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Electron volt
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Watt

Which of the following is not a unit of time

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Leap year
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Micro second
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Lunar month
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Light year

The S.I. unit of gravitational potential is

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J
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$J - k g^{- 1}$
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$J - k g$
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$J - k g^{- 2}$

Which one of the following is not a unit of young's modulus?

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$N m^{- 1}$
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$N m^{- 2}$
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$D y n e c m^{- 2}$
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Mega Pascal

In C.G.S. system the magnitutde of the force is 100 dynes. In another system where the fundamental physical quantities are kilogram, metre and minute, the magnitude of the force is

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0.036
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0.36
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3.6
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36

The unit of L/R is (where L = inductance and R = resistance)

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sec
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sec^–1
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Volt
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Ampere

Which is different from others by units?

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Phase difference
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Mechanical equivalent
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Loudness of sound
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Poisson's ratio

Length cannot be measured by

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Fermi
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Debye
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Micron
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Light year

The value of Planck's constant is

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$6 .63 \times 10^{- 34} J - \sec$
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$6 .63 \times 10^{34} J / \sec$
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$6 .63 \times 10^{- 34} k g - m^{2}$
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$6 .63 \times 10^{34} k g / \sec$

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Practice Physics Quiz Questions and Answers

0:0:1

Practice Physics Quiz Questions and Answers

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