If the error in the measurement of the radius of a sphere is 2%, then the error in the determination of the volume of the sphere will be:
1. 4%
2. 6%
3. 8%
4. 2%
Which two of the following five physical parameters have the same dimensions?
(1) | Energy density |
(2) | Refractive index |
(3) | Dielectric constant |
(4) | Young's modulus |
(5) | Magnetic field |
Choose the correct option:
1. | (2) and (4) |
2. | (3) and (5) |
3. | (1) and (4) |
4. | (1) and (5) |
Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, length L, time T, and current I, would be:
1.
2.
3.
4.
The velocity \(v\) of a particle at time \(t\) is given by \(v=at+\dfrac{b}{t+c}\), where \(a,\) \(b\) and \(c\) are constants. The dimensions of \(a,\) \(b\) and \(c\) are respectively:
1. \(\left[{LT}^{-2}\right],[{L}] \text { and }[{T}]\)
2. \( {\left[{L}^2\right],[{T}] \text { and }\left[{LT}^2\right]} \)
3. \( {\left[{LT}^2\right],[{LT}] \text { and }[{L}]} \)
4. \( {[{L}],[{LT}] \text { and }\left[{T}^2\right]}\)
The unit of thermal conductivity is:
1. | W m–1 K–1 | 2. | J m K–1 |
3. | J m–1 K–1 | 4. | W m K–1 |
In an experiment, the percentage errors that occurred in the measurement of physical quantities \(A,\) \(B,\) \(C,\) and \(D\) are \(1\%\), \(2\%\), \(3\%\), and \(4\%\) respectively. Then, the maximum percentage of error in the measurement of \(X,\) where \(X=\frac{A^2 B^{\frac{1}{2}}}{C^{\frac{1}{3}} D^3}\), will be:
1. \(10\%\)
2. \(\frac{3}{13}\%\)
3. \(16\%\)
4. \(-10\%\)
1. | \(a=1,\) \(b=-1,\) \(c=-2\) | pressure if
2. | \(a=1,\) \(b=0,\) \(c=-1\) | velocity if
3. | \(a=1,\) \(b=1,\) \(c=-2\) | acceleration if
4. | \(a=0,\) \(b=-1,\) \(c=-2\) | force if
The dimensions of where 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]