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Resistors: Type of work done by electric current; calculate resistance in circuit

If an electric circuit contains only an ordinary resistor, all the work done by the electric current appears as:

A) light

B) rotary motion

C) chemical action

D) heat

Two 10.0 ohm resistors are connected in parallel, and this combination is connected in series with a third 10.0 ohm resistor. The resistance of this network is

A) 10.0 ohms

B) 5.0 ohms

C) 15.0 ohms

D) 20.0 ohms

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Solution Summary

Each problem is clearly answered including calculations, as required.