If \(u_1\) and \(u_2\) are the units selected in two systems of measurement and \(n_1\) and \(n_2\) are their numerical values, then:
1. | \(n_1u_1=n_2u_2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \) |
2. | \(n_1u_1+n_2u_2=0\) |
3. | \(n_1n_2=u_1u_2\) |
4. | \((n_1+u_1)=(n_2+u_2)\) |
Universal time is based on :
1. Rotation of the earth on its axis
2. Earth's orbital motion around the Sun
3. Vibrations of cesium atom
4. Oscillations of quartz crystal
Unit of moment of inertia in MKS system
1.
2.
3.
4.
Unit of stress is:
1. \(\frac{\text{N}}{\text{m}}\)
2. \(\text{N-m}\)
3. \(\frac{\text{N}}{\text{m}^2}\)
4. \(\text{N-m}^2\)
Curie is a unit of
1. Energy of -rays
2. Half life
3. Radioactivity
4. Intensity of -rays
Hertz is the unit of
1. Frequency
2. Force
3. Electric charge
4. Magnetic flux