If u1 and u2 are the units selected in two systems of measurement and n1 and n2 are their numerical values, then:
1. | n1u1=n2u2 |
2. | n1u1+n2u2=0 |
3. | n1n2=u1u2 |
4. | (n1+u1)=(n2+u2) |
1 eV is
1. Same as one joule
2. 1.6×10−19J
3. 1 V
4. 1.6×10−19C
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. kg×cm2
2. kg/cm2
3. kg×m2
4. Joule×m
Unit of magnetic moment is
1. Ampere−metre2
2. Ampere−metre
3. Weber−metre2
4. Weber/metre
Curie is a unit of
1. Energy of γ-rays
2. Half life
3. Radioactivity
4. Intensity of γ-rays
Hertz is the unit of
1. Frequency
2. Force
3. Electric charge
4. Magnetic flux
One pico Farad is equal to
1. 10−24F
2. 10−18F
3. 10−12F
4. 10−6F