Electric Circuits

What two fundamental quantities are essential for understanding an electric circuit?

• Resistance and Capacitance

• Voltage and Current

• Power and Energy

• Frequency and Wavelength

Which symbol represents a resistor in a circuit diagram?

• A wavy line

• Two parallel lines

• A circle with a sine wave

• A line with a break and a pivot

In the water pipe analogy for electric circuits, what does a capacitor represent?

• A pump that pushes water

• A narrow section of pipe that slows water flow

• A dam that stops water flow and builds up pressure

• A valve that opens and closes the water path

If a circuit has a 9.00 V battery and a 10.00 Ohm resistor, what is the current flowing through the circuit?

• 90.00 Amps

• 1.11 Amps

• 0.90 Amps

• 19.00 Amps

What is the primary difference in how an open switch affects current flow in a series circuit compared to a parallel circuit?

• In a series circuit, an open switch stops current throughout the entire circuit, while in a parallel circuit, it stops current only in the branch containing the switch.

• In a parallel circuit, an open switch stops current throughout the entire circuit, while in a series circuit, it stops current only in the branch containing the switch.

• An open switch has no effect on current flow in either series or parallel circuits.

• In both series and parallel circuits, an open switch stops current only in the branch containing the switch.

A series circuit contains a 9.00 V battery and three 10.00 Ohm resistors. What is the total current flowing through the circuit?

• 0.90 Amps

• 0.30 Amps

• 2.70 Amps

• 3.00 Amps

How does the voltage across individual resistors compare in series and parallel circuits when connected to the same 9.00 V battery?

• In a parallel circuit, the voltage is the same across each resistor, while in a series circuit, the total voltage is divided among the resistors.

• In a series circuit, the voltage is the same across each resistor, while in a parallel circuit, the total voltage is divided among the resistors.

• The voltage is always 9.00 V across each resistor in both series and parallel circuits.

• The voltage is always divided equally among resistors in both series and parallel circuits.

Three 10.00 Ohm resistors are connected in parallel to a 9.00 V battery. What is the total equivalent resistance of this parallel circuit?

• 30.00 Ohms

• 10.00 Ohms

• 3.33 Ohms

• 0.30 Ohms