The physical quantity having the dimensions [ M-1 L-3 T3 A2 ] is
resistance
resistivity
electrical conductivity
electromotive force
A physical quantity X is given by X = The percentage error in the measurement of k, l, m and n are 1 %, 2%, 3% and 4% respectively. The value of X is uncertain by
8%
10%
12%
None of these
If the units of length, mass and force are chosen as fundamental units, the dimensions of time would be
[ M1/2 L-1/2 F1/2 ]
[ M1/2 L1/2 F1/2 ]
[ M1/2 L1/2 F-1/2 ]
[ M1/2 L-1/2 F-1/2 ]
If an error in measurement of radius of a sphere is 1%, what will be the error in the measurement of volume?
1 %
1.3 %
3 %
10 %
If C and R denote capacity and resistance, the dimensions of C R are :
M0L0T
ML0T
M0L0T2
not expressible in terms of M, L and T
The length, breadth and thickness of a block are given by l = 12 cm, b = 6 cm and t = 2.45 cm. The volume of the block according to the idea of significant figures should be:
1 × 102 cm3
2 × 102 cm3
1.763 × 102 cm3
none of the above
If x = is the permittivity of free space, l is length, V is potential difference and t is time. The dimensions of x are same as that of
charge
resistance
voltage
current