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Femme_physics
Gold Member
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We were given holiday homework from our teacher, but I'm not sure if we were given the proper tools to solve it. Is it only a formulas game? If so, how close am I to not being embarrassingly wrong?
An electrical engine that requires a flow of 5 A with the useful power of 1kW is connected to a voltage source of 220 V and has been operating for 3 hours. Calculate:
1) Invested power
2) Invested energy
3) The energy conversion efficency of the engine
4) The price of activating the engine, if the price of the electrical energy is 0.42 shekels for 1kWh.
All the electronics formulas you know...
Attached
Homework Statement
An electrical engine that requires a flow of 5 A with the useful power of 1kW is connected to a voltage source of 220 V and has been operating for 3 hours. Calculate:
1) Invested power
2) Invested energy
3) The energy conversion efficency of the engine
4) The price of activating the engine, if the price of the electrical energy is 0.42 shekels for 1kWh.
Homework Equations
All the electronics formulas you know...
The Attempt at a Solution
Attached