The force F between two charges Q1 and Q2 in free space is given by the formula below, where r is the distance between the charges. The units of E0 are
s⁴ A² kg⁻¹ m –3.
m² A² s⁻²kg⁻¹.
m³ s² kg⁻¹ C.
m³ s² A² kg⁻¹.
The SI unit of mutual inductance is the henry (H). Which of the following units is equivalent to the henry?
Ωs.
kgm²A⁻²s⁻¹.
kgm²s⁻⁴.
kgm²A⁻¹s⁻².
Which of the following has units kg m² s⁻²?
Momentum.
Energy.
Pressure.
Power.
The position, x, of an object is given by the equation x = A + Bt +Ct², where t refers to time. What are the dimensions of A, B, and C?
L, LT⁻¹, LT⁻².
L, T, T².
LT⁻¹, LT⁻², LT⁻³.
L, L, L.
