1. What exactly is voltage, current and resistance?
2. What is Ohm's law?
3. Consider a 9-V battery connected to a 6-ohm resistor. What is the current through the resistor?
4. Consider 2 batteries (1.5 V each). They are connected in series to 2 resistors (10 and 30 ohms). Find the current through each resistor.
5. In the problem above, what would happen if one of the resistors was removed from the circuit?
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