Capacitor

An electrician requires a capacitance of \(6 \mu \mathrm{F}\) in a circuit across a potential difference of \(1.5 \mathrm{~kV}\). A large number of \(2 \mu \mathrm{F}\) capacitors which can withstand a potential difference of not more than \(500 \mathrm{~V}\) are available. The minimum number of capacitors required for the purpose is