458 + Interview Questions in MEASUREMENTS IN GENERAL AWARENESS Page 6 InterviewSolution

251.	The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures isA. 663.821B. 664C. 663.8D. 663.82
Answer» Correct Answer - C `436.32+227.2+0.301=663.821` using rounding off it can be written as 663.8.

Discussion

252.	If L denotes the inductance of an inductor through which a current i is flowing, the dimensions of Li2 are (A) [L2 M1 T-2] (B) Not expressible in LMT (C) [L1 M1 T-2] (D) [L2 M2 T-2]
Answer» Answer is (A) [L² M¹ T^-2] \(\frac{1}{2}\) Li² = energy stored in an inductor = [M¹ L²T^-2]

252.

If L denotes the inductance of an inductor through which a current i is flowing, the dimensions of Li2 are (A) [L2 M1 T-2] (B) Not expressible in LMT (C) [L1 M1 T-2] (D) [L2 M2 T-2]

Answer»

Answer is (A) [L² M¹ T^-2]

\(\frac{1}{2}\) Li² = energy stored in an inductor

= [M¹ L²T^-2]

Discussion

253.	The dimensional formula of magnetic flux is .....(A) [M1 L2 T-3 A-1] (B) [M1 L2 T–2A–1] (C) [M-1 L-2 T2 A1] (D) [M1 L3 T-2 A-1]
Answer» Answer is (B) [M¹ L² T^–2A^–1]

Discussion

254.	Dimensional formula for electrical field is ......(A) [M1 L2 T-3 A-2] (B) [M1 L2 T-3 A-1] (C) [M1 L1 T-3 A-1] (D) [M0 L0 T0 A0]
Answer» Answer is (C) [M¹ L¹ T^-3 A^-1] Electric Field = \(\frac{Force}{Charge}\) = \(\frac{[M^1L^1T^{-2}]}{[A^1T^1]}\) [E] = [M¹ L¹ T^-3 A^-1]

254.

Dimensional formula for electrical field is ......(A) [M1 L2 T-3 A-2] (B) [M1 L2 T-3 A-1] (C) [M1 L1 T-3 A-1] (D) [M0 L0 T0 A0]

Answer»

Answer is (C) [M¹ L¹ T^-3 A^-1]

Electric Field = \(\frac{Force}{Charge}\) = \(\frac{[M^1L^1T^{-2}]}{[A^1T^1]}\)

[E] = [M¹ L¹ T^-3 A^-1]

Discussion

255.	Dimensions of length in electric dipole moment, electric flux and electric field are respectively(A) L, L2 , L3 (B) L3 , L2 , L (C) L-1 , L3 , L3 (D) L, L3 , L
Answer» Answer is (D) L, L³ , L [Dipole moment] = [M⁰ L¹ T¹ A¹] [Electric flux] = [M¹ L³ T^-3 A^-1] [Electric field] = [M¹ L¹T^-3 A^-1]

255.

Dimensions of length in electric dipole moment, electric flux and electric field are respectively(A) L, L2 , L3 (B) L3 , L2 , L (C) L-1 , L3 , L3 (D) L, L3 , L

Answer»

Answer is (D) L, L³ , L

[Dipole moment] = [M⁰ L¹ T¹ A¹]

[Electric flux] = [M¹ L³ T^-3 A^-1]

[Electric field] = [M¹ L¹T^-3 A^-1]

Discussion

256.	The dimensional equation for the electrical resistance of a conductor is(A) [M1 L2 T2 I-1] (B) [M1 L2 T-2 I-1] (C) [M1 L1 T-3 I-2] (D) [M1 L2 T-3I-2]
Answer» Answer is (D) [M¹ L² T^-3I^-2]

Discussion

257.	The number of significant figures in 0.002305 is(A) 6 (B) 4 (C) 7 (D) 2
Answer» Answer is (B) 4

Discussion

258.	From the dimensional consideration, which of the following equations is correct?A. `T=2pisqrt(R^(3))/(GM)`B. `T=2pi sqrt(GM)/R^(3)`C. `T=2pi sqrt(GM)/(R^(2))`D. `T=2pi sqrt(R^(2)/(GM)`
Answer» Correct Answer - A Taking, `T=2pi sqrt(R3)/(GM)` substituting the dimensions, `LHS=[T]RHS2pi\|sqrt(R^(3)/(GM))\|=sqrt([L]^(3)/([M^(-1)L^(3)T^(-2)][M]))=sqrt([T]^(2))=[T]` `Thus, LHS=RHS for `T=2pisqrt(R^(3)/(GM))`

Discussion

259.	Match the list-I with list-II List-I List-II P Boltzmann constant (I) [ML0T0] Q Coefficient of viscosity (II) [ML-1 T-1] R Water equivalent (III) [MLT-3 K-1] S Coefficient of thermal conductivity (IV) [ML2 T–2 K-1](A) P – III, Q – I, R – II, S – IV (B) P – III, Q – II, R – I, S – IV (C) P – IV, Q – II, R – I, S – III (D) P – IV, Q – I, R – II, S – III
Answer» Answer is (C) P – IV, Q – II, R – I, S – III Boltzmann constant (kB) = \(\frac{PV}{NT}\) S.I. unit: J K^-1 = [M¹ L² T^-2 K^-1] Coefficient of viscosity (η) = \(\frac{F}{A\Big(\frac{dv}{dx}\Big)}\) S.I. unit : \(\frac{Ns}{m^2}\) ≡ [M¹L^-1T^-1] Water equivalent is the mass of water that will absorb or lose same quantity of heat as that of the substance for the same change in temperature. S.I. unit : kg ≡ [M¹ L⁰ T⁰] Coefficient of thermal conductivity (K) = \(\frac{Q}{At\Big(\frac{Δθ}{Δx}\Big)}\) S.I. unit : J/ m s K ≡ [M¹ L¹ T^-3 K^-1]

259.

Match the list-I with list-II List-I List-II P Boltzmann constant (I) [ML0T0] Q Coefficient of viscosity (II) [ML-1 T-1] R Water equivalent (III) [MLT-3 K-1] S Coefficient of thermal conductivity (IV) [ML2 T–2 K-1](A) P – III, Q – I, R – II, S – IV (B) P – III, Q – II, R – I, S – IV (C) P – IV, Q – II, R – I, S – III (D) P – IV, Q – I, R – II, S – III

Answer»

Answer is (C) P – IV, Q – II, R – I, S – III

Boltzmann constant (kB) = \(\frac{PV}{NT}\)

S.I. unit: J K^-1 = [M¹ L² T^-2 K^-1]

Coefficient of viscosity (η) = \(\frac{F}{A\Big(\frac{dv}{dx}\Big)}\)

S.I. unit : \(\frac{Ns}{m^2}\) ≡ [M¹L^-1T^-1]

Water equivalent is the mass of water that will absorb or lose same quantity of heat as that of the substance for the same change in temperature.

S.I. unit : kg ≡ [M¹ L⁰ T⁰]

Coefficient of thermal conductivity (K)

= \(\frac{Q}{At\Big(\frac{Δθ}{Δx}\Big)}\)

S.I. unit : J/ m s K ≡ [M¹ L¹ T^-3 K^-1]

Discussion

260.	In the equation `((1)/(pbeta))=(y)/(k_(B)T)`, where `p` is the pressure, `y` is the distance, `k_(B)` is Boltzmann constant and `T` is the tempreture. Dimensions of `beta` areA. `[M^(-1)L^(1)T^(2)]`B. `[M^(0)L^(2)T^(0)]`C. `[M^(1)L^(-1)T^(-2)]`D. `[M^(0)L^(0)T^(0)]`
Answer» Correct Answer - B Given equation,` (1)/(p beta)=(y)/(K_(B)T)` where , p= prossure,y=distance, `k_(B)=` Boltzmann constant and T=temperature Dimension of `[beta]=(["Dimensions of" k_(B)] ["Dimensions of" T])/(["Dimensions of p"]["Dimensions of Y"])` `=([ML^(2)T^(3)][T])/([ML^(-1)T^(-2)][L])=[M^(0)L^(0)T^(0)]`

Discussion

261.	Out of the following pairs, which one does NOT have identical dimensions? (A) Energy and moment of force (B) Work and torque (C) Density and surface energy (D) Pressure and stress
Answer» Answer is (C) Density and surface energy

Discussion

262.	Which one of the following pairs has the same dimensions ?A. Torque and ForceB. Energy and AccelerationC. Light Year and WavelengthD. Velocity and Momentum
Answer» Correct Answer - c Both light year and wavelength denote lengths or distances and they have the same dimensional equation of `[M^(0)L^(1)T^(0)]`. (a), (b) and (d) are different physical quantities.

Discussion

263.	The CGS unit of pressuure ______.
Answer» Correct Answer - dyne `cm^(-2)` or gwt `cm^(-2)`

Discussion

264.	10 g of water occupies____`cm^(3)` of volume
Answer» Correct Answer - 10

Discussion

265.	A ball is placed between two wooden blocks as shown in the figure. The volume of the sphere is_____ .A. `6.54cm^(3)`B. `1.15cm^(3)`C. `2.14m^(3)`D. `2.14cm^(3)`
Answer» Correct Answer - B From the figure we can find out the diameter. Diameter of the ball=1.3cm, radius `=(1.3)/(2)=0.65`cm volume `=(4)/(3)xx(22)/(7)xx(0.65)^(3)=1.15cm^(3)`

Discussion

266.	A ball is placed between two wooden blocks as shown in the figure. The volume of the sphere is_____ .A. `6.54cm^(3)`B. `1.15cm^(3)`C. `2.14m^(3)`D. `2.14cm^(3)`
Answer» Correct Answer - B From the figure we can find out the diameter. Diameter of the ball=1.3cm, radius `=(1.3)/(2)=0.65`cm volume `=(4)/(3)xx(22)/(7)xx(0.65)^(3)=1.15cm^(3)`

Discussion

267.	The weight of a body can be zero when ____acts on it.
Answer» Correct Answer - no gravitaional force The weight of a body can be zero when no gravitational force acts on it.

Discussion

268.	The density of water at `4^@C` is:A. 1 g `cm^(-3)`B. 100 kg `m^(-3)`C. 1000 g `cm^(-3)`D. 1 kg `m^(-3)`
Answer» Correct Answer - A Density of water at `4^(@)C` is 1 g `cm^(-3)`.

Discussion

269.	Which among the following is the unit of density?A. kg `m^(-3)`B. g `m^(-3)`C. kg `m^(-3)`D. All the above
Answer» Correct Answer - D Density `=("mass")/("Volume")` kg `m^(-3)`,g" "m^(-3)` and kg `cm^(-3)` are also unit of density.

Discussion

270.	Sea breeze is due to thhe change in density of air with_____.A. change in temperatureB. chain in pressureC. change in windD. change is whether condition
Answer» Correct Answer - A The see a breeze is due to the change in density of air with change in temperature.

Discussion

271.	Density of water at `4^(@)C` is _____.A. 1 g `cm^(-3)`B. 100 kg `m^(-3)`C. 1000 g `cm^(-3)`D. 1 kg `m^(-3)`
Answer» Correct Answer - A Density of water at `4^(@)C` is 1 g `cm^(-3)`.

Discussion

272.	The density of liquid can measured by using a ______.A. spring balanceB. measuring cylinderC. density bottleD. physical balance
Answer» Correct Answer - C The density of liquid can be measured by using a density bottle.

Discussion

273.	If the area of a square field is 100 `cm^(2)`, then the length of the side is______A. 1 cmB. 1 mC. 0.1 mD. 10 m
Answer» Correct Answer - C Area of square `=("side")^(2)=100cm^(2)` Side=10cm=0.1m

Discussion

274.	The area of a circle whose radius is 10 cm is _____.A. 314 `cm^(2)`B. 314 `m^(2)`C. 3.1415 `m^(2)`D. both a and b
Answer» Correct Answer - A Area of circle `=pir^(2)` `=pixx10^(2)=314cm^(2)`

Discussion

275.	Volume of water is a burette is 35 ml. Find the volume of a drop of water if volume of water in the burette is 5 ml when 50 drops of water drained out
Answer» Voume of single drop of water `= (35-5)/(50)=0.6 "ml"`

Discussion

276.	The least count of the vernier calipers shown in the figure is ________. A. 0.25 mmB. 0.025 mmC. 0.025 cmD. `250 mum`
Answer» Correct Answer - B 1 MSD = 0.5 mm Number of vernier scale divisions (N) = 20 `therefore count = (1 MSD)/(N) = (0.05 mm)/(N) = 0.025 mm`

Discussion

277.	S.I system of unit contains ......... supplementary unit. (A) 7 (B) 2 (C) many (D) 4
Answer» S.I system of unit contains 2 supplementary unit.

Discussion

278.	The SI unit of luminous intensity is ........... (A) watt (B) lux (C) lumen (D) candela
Answer» Answer is (D) (D) candela

Discussion

279.	Which of the following is a supplementary unit? (A) steradian (B) candela (C) kelvin (D) pascal
Answer» Answer is (A) steradian

Discussion

280.	The dimensional formula for impulse is the same as dimensional formula for ....... (A) acceleration (B) force (C) momentum (D) rate of change in momentum
Answer» Answer is (C) momentum

Discussion

281.	The number of significant figures in 52340000 isA. 8B. 4C. 5D. 6
Answer» Correct Answer - b Four, the number should be written as `5234xx10^(4)`.

Discussion

282.	The length and breadth of a metal sheet are 2.325 m and 3.142 m respectively. What is the area of this sheet using proper number of significant figures?A. `7.30515m^(2)`B. `7.3051m^(2)`C. `7.305m^(2)`D. `7.31m^(2)`
Answer» Correct Answer - c Area = `Lxxb=2.325xx3.142=7.30515m^(2)` L and b have four significant figures. Hence rounding off the number 7.30515 to four significant figures, we get the area of the sheet = `7.305m^(2)`

Discussion

283.	The order of magnitude of 49 and the order of magnitude of 51 (A) is same. (B) differs by 1. (C) is 1. (D) is 2.
Answer» Answer is (B) differs by 1

Discussion

284.	Which of the following represents a unified atomic mass unit (1u)? (A) 8.333 x 10-1 of the mass of an atom of 12C in kg (B) 0.8333 x 10-1 of the mass of an atom of 12C in g (C) 8.333 x 10-1 of the mass of an atom of 12C in g (D) 0.8333 x 10-1 of the mass of an atom of 12C in kg
Answer» Answer is (D) 0.8333 x 10^-1 of the mass of an atom of ¹²C in kg

Discussion

285.	Which of the following equations is dimensionally correct? (A) pressure = Energy per unit volume (B) pressure = Energy per unit area (C) pressure = Momentum x volume x time (D) pressure = Force x area
Answer» Answer is (A) pressure = Energy per unit volume

Discussion

286.	How will you express the number 43,410,00 in powers of ten?A. `4.341xx10^(5)`B. `4.341xx10^(6)`C. `4.341xx10^(7)`D. `4.341xx10^(8)`
Answer» Correct Answer - b For this 7 digit number, we shift the decimal point from right to left 6 times and get the number 4.341000. But as each shift to left is equivalent to dividing the number by ten, we compensate it by multiplying it by `10^(1)`. Thus in this case for 6 shifts, we have to multiply by `10^(6)` and hence the number is expressed as `4.341xx10^(6)`.

Discussion

287.	In the expression A = xy3/z2 the percentage error is given by(A) \(\Big(\frac{Δx}{x}+3\frac{Δy}{y}-2\frac{Δz}{z}\Big)\)x 100%(B) \(\Big(\frac{Δx}{x}+\frac{3Δy}{y}+\frac{2Δz}{z}\Big)\)x 100%(C) \(\Big(\frac{Δx}{x}-\frac{3Δy}{y}-\frac{2Δz}{z}\Big)\)x 100%(D) \(\Big(\frac{Δx}{x}-3\frac{Δy}{y}+2\frac{Δz}{z}\Big)\)x 100%
Answer» Answer is (B) \(\Big(\frac{Δx}{x}+\frac{3Δy}{y}+\frac{2Δz}{z}\Big)\)x 100%

Discussion

288.	Universal time is based on (A) rotation of the earth on its axis. (B) Earth’s orbital motion around the Sun. (C) vibrations of cesium atom. (D) oscillations of quartz crystal.
Answer» Answer is (C) vibrations of cesium atom

Discussion

289.	The area of a square plot is 100 `m^(2)`. Then the value of its perimeter is____m.
Answer» Correct Answer - 40

Discussion

290.	Which of the following is NOT a characteristic of a good unit? (A) It is invariable. (B) It is reproducible. (C) It is perishable. (D) It is easily available.
Answer» Answer is (C) It is perishable.

Discussion

291.	We know that every derived quantity can be written in terms of some of the fundamental quantities. For example, volume = `("length")^(3), "speed" = ("lenght")/("time")`. Using the definitions of the following quanitities, express force in terms of fundamental quantities. Represent mass as [M], length as [L] and time as[T]. (i) Displacement = shortest distance betweenj the inital and final positions. (ii) Velocity = `("displacement")/("time")` (iii) Momentum = `"mass" xx "velocity"` brgt (iv) Force = `("momentum")/("time")`
Answer» (i) Speed = `(distance)/(time)` (ii) [L] (iii) `[LT^(-1)]` (iv) `[MLT^(-1)]` (v)`[MLT^(-2)]`

Discussion

292.	Units are classified into ........ groups. (A) 2 (B) 4 (C) 5 (D) 6
Answer» Answer is (A) 2 4 is the correct answer...☺

Discussion

293.	The physical quantity having the same unit in all the systems of unit is ........... (A) length (B) time (C) mass (D) foot
Answer» Answer is (B) time

Discussion

294.	If the magnitude of length is halved and that of mass is doubled then dimension of force is(A) [M2L-2 T-2] (B) [M2L-1/2T-2] (C) [M2L1/2T-2] (D) [M1L1 T-2]
Answer» Answer is (D) [M¹L¹ T^-2] The dimension of a quantity is independent of changes in its magnitude.

294.

If the magnitude of length is halved and that of mass is doubled then dimension of force is(A) [M2L-2 T-2] (B) [M2L-1/2T-2] (C) [M2L1/2T-2] (D) [M1L1 T-2]

Answer»

Answer is (D) [M¹L¹ T^-2]

The dimension of a quantity is independent of changes in its magnitude.

Discussion

295.	The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 is (A) 1 (B) 2 (C) 3 (D) 4
Answer» Answer is (D) 4 The number of significant figures in all of the given number is 4.

295.

The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 is (A) 1 (B) 2 (C) 3 (D) 4

Answer»

Answer is (D) 4

The number of significant figures in all of the given number is 4.

Discussion

296.	The number of significant figures in 0.400 is (A) 1 (B) 2 (C) 3 (D) 4
Answer» Answer is (C) 3

Discussion

297.	A paper cutting is placed on a graph a as shown in the figure, each division on the X and Y axes represents a distance off 1 cm. The area of the paper cutting is `"__________"` `cm^(2)`.A. 100B. 112C. 93D. 96
Answer» Correct Answer - C we can divide the given figure into 5 rectangles. Total area =` 15+24+24+12+18=93 cm^(2)`

Discussion

298.	The mass of an empty density bottle is 50 g. When it is completely filledwith water, its mass is foundto be 100 g and when itiscompletly filledwith aliquid,its mass is 150 g. The density of the liquid is `"_________"` kg `m^(-3)`.A. (a) 2B. (b) 2000C. (c ) 3.5D. (c )3500
Answer» Correct Answer - B Mass of the empty density bottle,` m_(1)` =50 g Mass of he bottle with water, `m^(2)` = 100 g Mass of te bottle with liquid, `m_(3)` =150 g Volume v = dxxm = 1xx50 = 50 `cm^(3)` Density ofliquid = mass of liquid/volume of liquid=`(m_(3)-m_(1))/v=(150-50)/(100-50` = `100/50= 2 " g "cm^(-3)=2000 " kg "m^(-3)`

Discussion

299.	A paper cutting is placed on a graph a as shown in the figure, each division on the X and Y axes represents a distance off 1 cm. The area of the paper cutting is `"__________"` `cm^(2)`.A. 100B. 112C. 93D. 96
Answer» Correct Answer - C we can divide the given figure into 5 rectangles. Total area =` 15+24+24+12+18=93 cm^(2)`

Discussion

300.	A paper cutting is placedon a graph as shownin the figure, each on he X and Y axes represens a distance of2 cm. The area of the paper cutting is `"_________"` ` Cm^(2)`.A. (a) 378B. (b) 186C. (c ) 312D. (d) 156
Answer» Correct Answer - C We can divide the paper cutting into 3 rectangles of dimension`(9xx3), (11xx3), (9xx2)` Area = `(9xx3) + (11xx3) + (9xx2)` = 78, but 1 div = 2 cm Area = `78xx4` =312 `cm^(2)`

Discussion

Explore topic-wise InterviewSolutions in .

The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures isA. 663.821B. 664C. 663.8D. 663.82

If L denotes the inductance of an inductor through which a current i is flowing, the dimensions of Li2 are (A) [L2 M1 T-2] (B) Not expressible in LMT (C) [L1 M1 T-2] (D) [L2 M2 T-2]

The dimensional formula of magnetic flux is .....(A) [M1 L2 T-3 A-1] (B) [M1 L2 T–2A–1] (C) [M-1 L-2 T2 A1] (D) [M1 L3 T-2 A-1]

Dimensional formula for electrical field is ......(A) [M1 L2 T-3 A-2] (B) [M1 L2 T-3 A-1] (C) [M1 L1 T-3 A-1] (D) [M0 L0 T0 A0]

Dimensions of length in electric dipole moment, electric flux and electric field are respectively(A) L, L2 , L3 (B) L3 , L2 , L (C) L-1 , L3 , L3 (D) L, L3 , L

The dimensional equation for the electrical resistance of a conductor is(A) [M1 L2 T2 I-1] (B) [M1 L2 T-2 I-1] (C) [M1 L1 T-3 I-2] (D) [M1 L2 T-3I-2]

The number of significant figures in 0.002305 is(A) 6 (B) 4 (C) 7 (D) 2

From the dimensional consideration, which of the following equations is correct?A. `T=2pisqrt(R^(3))/(GM)`B. `T=2pi sqrt(GM)/R^(3)`C. `T=2pi sqrt(GM)/(R^(2))`D. `T=2pi sqrt(R^(2)/(GM)`

In the equation `((1)/(pbeta))=(y)/(k_(B)T)`, where `p` is the pressure, `y` is the distance, `k_(B)` is Boltzmann constant and `T` is the tempreture. Dimensions of `beta` areA. `[M^(-1)L^(1)T^(2)]`B. `[M^(0)L^(2)T^(0)]`C. `[M^(1)L^(-1)T^(-2)]`D. `[M^(0)L^(0)T^(0)]`

Out of the following pairs, which one does NOT have identical dimensions? (A) Energy and moment of force (B) Work and torque (C) Density and surface energy (D) Pressure and stress

Which one of the following pairs has the same dimensions ?A. Torque and ForceB. Energy and AccelerationC. Light Year and WavelengthD. Velocity and Momentum

The CGS unit of pressuure ______.

10 g of water occupies____`cm^(3)` of volume

A ball is placed between two wooden blocks as shown in the figure. The volume of the sphere is_____ .A. `6.54cm^(3)`B. `1.15cm^(3)`C. `2.14m^(3)`D. `2.14cm^(3)`

A ball is placed between two wooden blocks as shown in the figure. The volume of the sphere is_____ .A. `6.54cm^(3)`B. `1.15cm^(3)`C. `2.14m^(3)`D. `2.14cm^(3)`

The weight of a body can be zero when ____acts on it.

The density of water at `4^@C` is:A. 1 g `cm^(-3)`B. 100 kg `m^(-3)`C. 1000 g `cm^(-3)`D. 1 kg `m^(-3)`

Which among the following is the unit of density?A. kg `m^(-3)`B. g `m^(-3)`C. kg `m^(-3)`D. All the above

Sea breeze is due to thhe change in density of air with_____.A. change in temperatureB. chain in pressureC. change in windD. change is whether condition

Density of water at `4^(@)C` is _____.A. 1 g `cm^(-3)`B. 100 kg `m^(-3)`C. 1000 g `cm^(-3)`D. 1 kg `m^(-3)`

The density of liquid can measured by using a ______.A. spring balanceB. measuring cylinderC. density bottleD. physical balance

If the area of a square field is 100 `cm^(2)`, then the length of the side is______A. 1 cmB. 1 mC. 0.1 mD. 10 m

The area of a circle whose radius is 10 cm is _____.A. 314 `cm^(2)`B. 314 `m^(2)`C. 3.1415 `m^(2)`D. both a and b

Volume of water is a burette is 35 ml. Find the volume of a drop of water if volume of water in the burette is 5 ml when 50 drops of water drained out

The least count of the vernier calipers shown in the figure is ________. A. 0.25 mmB. 0.025 mmC. 0.025 cmD. `250 mum`

S.I system of unit contains ......... supplementary unit. (A) 7 (B) 2 (C) many (D) 4

The SI unit of luminous intensity is ........... (A) watt (B) lux (C) lumen (D) candela

Which of the following is a supplementary unit? (A) steradian (B) candela (C) kelvin (D) pascal

The dimensional formula for impulse is the same as dimensional formula for ....... (A) acceleration (B) force (C) momentum (D) rate of change in momentum

The number of significant figures in 52340000 isA. 8B. 4C. 5D. 6

The length and breadth of a metal sheet are 2.325 m and 3.142 m respectively. What is the area of this sheet using proper number of significant figures?A. `7.30515m^(2)`B. `7.3051m^(2)`C. `7.305m^(2)`D. `7.31m^(2)`

The order of magnitude of 49 and the order of magnitude of 51 (A) is same. (B) differs by 1. (C) is 1. (D) is 2.

Which of the following represents a unified atomic mass unit (1u)? (A) 8.333 x 10-1 of the mass of an atom of 12C in kg (B) 0.8333 x 10-1 of the mass of an atom of 12C in g (C) 8.333 x 10-1 of the mass of an atom of 12C in g (D) 0.8333 x 10-1 of the mass of an atom of 12C in kg

Which of the following equations is dimensionally correct? (A) pressure = Energy per unit volume (B) pressure = Energy per unit area (C) pressure = Momentum x volume x time (D) pressure = Force x area

How will you express the number 43,410,00 in powers of ten?A. `4.341xx10^(5)`B. `4.341xx10^(6)`C. `4.341xx10^(7)`D. `4.341xx10^(8)`

Universal time is based on (A) rotation of the earth on its axis. (B) Earth’s orbital motion around the Sun. (C) vibrations of cesium atom. (D) oscillations of quartz crystal.

The area of a square plot is 100 `m^(2)`. Then the value of its perimeter is____m.

Which of the following is NOT a characteristic of a good unit? (A) It is invariable. (B) It is reproducible. (C) It is perishable. (D) It is easily available.

Units are classified into ........ groups. (A) 2 (B) 4 (C) 5 (D) 6

The physical quantity having the same unit in all the systems of unit is ........... (A) length (B) time (C) mass (D) foot

If the magnitude of length is halved and that of mass is doubled then dimension of force is(A) [M2L-2 T-2] (B) [M2L-1/2T-2] (C) [M2L1/2T-2] (D) [M1L1 T-2]

The number of significant figures in all the given numbers 25.12, 2009, 4.156 and 1.217 x 10-4 is (A) 1 (B) 2 (C) 3 (D) 4

The number of significant figures in 0.400 is (A) 1 (B) 2 (C) 3 (D) 4

A paper cutting is placed on a graph a as shown in the figure, each division on the X and Y axes represents a distance off 1 cm. The area of the paper cutting is `"__________"` `cm^(2)`.A. 100B. 112C. 93D. 96

The mass of an empty density bottle is 50 g. When it is completely filledwith water, its mass is foundto be 100 g and when itiscompletly filledwith aliquid,its mass is 150 g. The density of the liquid is `"_________"` kg `m^(-3)`.A. (a) 2B. (b) 2000C. (c ) 3.5D. (c )3500

A paper cutting is placed on a graph a as shown in the figure, each division on the X and Y axes represents a distance off 1 cm. The area of the paper cutting is `"__________"` `cm^(2)`.A. 100B. 112C. 93D. 96

A paper cutting is placedon a graph as shownin the figure, each on he X and Y axes represens a distance of2 cm. The area of the paper cutting is `"_________"` ` Cm^(2)`.A. (a) 378B. (b) 186C. (c ) 312D. (d) 156