How does adding a resistor to an electric circuit affect the current?
a. The resistor increases the current by increasing the amount of electric charge.
b. The resistor decreases the current by transforming electrical energy into different types of energy.
c. The resistor decreases the current by decreasing the amount of electric charge.
d. The resistor increases the current by transforming light energy or heat into electrical energy.
The correct answer is c. The resistor decreases the current by decreasing the amount of electric charge.
When a resistor is added to a circuit, it creates resistance to the flow of current. This reduces the amount of current that can flow through the circuit, as the energy is transferred to the resistor and converted to heat. The reduction in current is proportional to the resistance of the resistor, following Ohm's law.