The SI units of magnetic field is _____.

The dimensions of energy per unit volume are the same as those of _____.

The SI units of the universal gravitational constant G are _____.

'Parsec' is the unit of _____.

The density of a cube is measured by measuring its mass and the length of its sides. If the maximum errors in the measurement of mass and length are 3% and 2% respectively, then the maximum error in the measurement of density is _____.

Which unit is used to measure size of a nucleus?

How many amu make 1 kg?

Human heart is an inbuilt clock.comment.

Define one Barn.How it is related with metre?

A jeweller put a diamond weighing 5.42 g in a box weighing 1.2 Kg. Find the total weight of the box and the diamond to correct number of significant figures.

Express an acceleration of 10 m/s² in km/h².

Do \(\mathring { A } \)  and A. U. stand for same length.

Name two pairs of physical quantities whose dimensions are same.

What is the order of precision of an atomic clock?

Wl1at does SONAR stand for?

A capacitor of capacitance \(C=(2.0\pm 0.1)\mu F\) is charged to a voltage \(V=(20\pm 0.5)V\). Calculate the charge Q with error limits.

It is required to find the volume of a rectangular block. A vernier calliper is used to measure the length, width and height of the block. The measured values are found to be 1.37cm, 4.11 cm and 2.56 cm, respectively. Calculate correctly, the volume of the block.

Round off the following number as indicated
\(101.55\times { 10 }^{ 6 }\) upto 4 digits 

If the length and time period of an oscillating pendulum have errors of 1% and 2% respectively, what is the error ill the estimate of g?

The sun's angular diameter is measured to be 1920. The distance r of the sun from the earth is \(1.496\times { 10 }^{ 11 }\) m. What is the diameter of the sun?

Estimate the average mass density of sodium atom assuming its size to be about 2.5 \(\mathring{A}\). (Use the known values of Avogadro's number and the atomic mass of sodium). Compare it with the density of sodium in its crystalline phase 970kg/m³ . Are the two densities of the same order of magnitude? If so, why?

It is known that the period T of a magnet of magnetic moment M vibrating in a uniform magnetic field of intensity B depends upon M, B and I where I is the moment of inertia of the magnet about its axis of oscillations. Show that
\(T=2\pi \sqrt { \frac { 1 }{ MB } } \)

The heat dissipated in a resistance can be obtained by the measurement of resistance, the current and time. If the maximum error in the measurement of these quantities is 1%, 2% and 1% respectively, what is the maximum error in determination of the dissipated heat?