# Physics problem

3. In a certain installation the following items of equipment are operating at the same time.(i)a 3kw immersion heater (ii) two 100w lamps (iii) one 2kw radiator. All there are rated at 240V the nominal supply voltage at the origin of installation is 5Vless than this. Calculate (a) the total current.

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#### Solution Preview

We first get the resistance of the appliances:

R1 = (240)^2/3000 = 19.2 ohms

R2 = R3 = (240)^2/100 ...

#### Solution Summary

This posting contains the solution to the given problems regarding currents.

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