unit and dimension

which of the following is a correct unit of gravitational constant ?

• m³kg^-1s^_2

• m³kg-²s^-1

• m-³kg-¹s-²

• m^-3kg²s^-1

The unit of stefan's Boltzmann constant σ is

• Wm^-1k^-4

• Wm^-2k^-4

• Jm^-2k^-4

• calorie m^-2k^-4

The dimensional formula of coefficient of viscosity is

• [ML^-1T^-1]

• [ML⁰T⁰]

• [ML^-2T^-1]

• [ML^-1T^-1]

The dimensional formula of impulse is

• [MLT^-2]

• [MLT^-1]

• [ML²T^-1]

• [M²LT^-1]

The dimension of current is

• [M⁰L⁰TQ^-1]

• [M⁰L⁰T^-1Q]

• [M⁰LT^-1Q^-1]

• [M⁰L⁰T^-1Q^-1]

The dimension of E/B is same as that of

• velocity

• momentum

• force

• acceleration

NC^-1 has the same dimension as

• volt meter

• Farad meter

• Farad/meter

• volt/meter

The star nearest to earth is a 4 light year away. The distance is

• 9.46×10¹⁵ m

• 9.5×10¹² m

• 37.84×10¹⁵ m

• 37.84×10¹² m