Current, Charge, Voltage and Energy - EPA
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Give a worded explanation of current. | Rate of flow of charge past a point in the circuit.
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| In what type of circuit is the current the same throughout? | Series
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| Define electrical energy. | Electrical Energy = Charge x Voltage (W = QV)
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| What is emf of a power supply a measure of? | Total energy that it supplied to each coulomb of charge
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| A power supply has an emf of 0.001V. When Ekrem's X-Box is connected to this a current of 5A is measured using an ammeter. Calculate the resistance of the circuit. | 0.0002 Ohms (By the word Ohms i mean the symbol)
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| Enter Yianni and Erol. Erol says 'Yo Ktori, you know that due to the incompetance of X-box,the free ammeters that they supply with the x-boxes give off a faulty reading.' Erol is correct and the actual current in the circuit is 5x10^-3A. Calculate resista | 0.2 Ohms
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| Define Power | Power = energy transferred/Time taken
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| How do you work out efficiency? | Energy usefully transferred/Total energy transferred
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| When current is proportional to voltage what law is obeyed? | Ohms law
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Created by:
epambou
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