# Electricity - power

5

In the circuit above there is an unknown part, which not necessarily is a resistor. The voltage is in volt and the current in milliampere.

How much power is delivered to the part when the voltage across it is 3 V?   (Answer).

6

 The exercises beneath all represent different situations, where a resistor is connected to the poles of a battery.1. Determine the delivered power in this arrangement.   (Answer). 2. Determine the delivered power in this arrangement.   (Answer). 3. Determine the delivered power in this arrangement.   (Answer). 4. Determine the voltage drop over the resistor in This arrangement.  (Answer). 5. Determine the current in this arrangement.   (Answer).

7

In the circuit above a resistor is connected to a variable voltage source. Which of the 5 graphs A-B-C-D-E is correct. Use the slider to vary the voltage.   (Answer).

8

In the circuit above a resistor is connected to a variable voltage source. Which of the 5 graphs A-B-C-D-E is correct. Use the slider to vary the voltage.   (Answer).

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