If dimensions of critical velocity vc of a liquid flowing through a tube are expressed as ηxρyrz, where η, ρ and r are the coefficient of viscosity of the liquid, the density of liquid and radius of the tube respectively, then the values of x, y and z, respectively, will be

1. 1, -1, -1

2. -1, -1, 1

3. -1, -1, -1

4. 1, 1, 1,

Subtopic:  Dimensions |
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If energy (E), velocity (v) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be:
1. [Ev-2T-1]
2. [Ev-1T-2]
3. [Ev-2T-2]
4. [E-2v-1T-3]

Subtopic:  Dimensions |
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If force (F), velocity (v) and time (T) are taken as fundamental units, the dimensions of mass will be

1. [FvT-1]

2. [FvT-2]

3. [Fv-1T-1]

4. [Fv-1T]

Subtopic:  Dimensions |
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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 =  a3b2cd
Percentage error in P is :
1. 10%
2. 7%
3. 4%
4. 14%

Subtopic:  Errors |
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The dimensions of (μ0ε0)-1/2 are -

1.  [ L-1T ]

2.  [ LT-1 ]

3.  [ L1/2T1/2 ]

4. [ L1/2T-1/2 ]

Subtopic:  Dimensions |
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The dimensions of μ0ε0-1/2 are

1.  L-1 T

2.  LT-1

3.  L-1/2 T1/2

4.  L-1/2 T-1/2

Subtopic:  Dimensions |
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The density of a material in CGS system of units is 4 g/cm3. In a system of units in which unit of length is 10 cm and unit of mass is 100g, the value of density of material will be
1. 0.04
2. 0.4
3. 40
4. 400

Subtopic:  Dimensions |
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The dimensions of 12ε0E2 where ε0 is the permittivity of free space and E is the electric field, are:

1. [ML2T-2]

2. [ML-1T-2]

3.  [ML2T-1]

4.  [MLT-1]

Subtopic:  Dimensions |
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A student measures the distance traversed in free fall of a body, initially at rest in a given time. He uses this data to estimate g, the accelration due to gravity. If the maximum percentage errors in measurement of the distance and the time are e1
and e2 respectively, the percentage error in the estimation of g is -

1. e1+2e2

2. e1+e2

3. e1-2e2

4. e2-e1

Subtopic:  Errors |
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If the dimensions of a physical quantity are given by MaLbTc, then the physical quantity will be:
1. Pressure if a = 1, b = -1, c = - 2
2. Velocity if a = 1, b = 0, c = - 1
3. Acceleration if a = 1, b = 1, c = - 2
4. Force if a = 0, b =-1, c = - 2
Subtopic:  Dimensions |
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