Chapter 7 Review

A series circuit with five resistors has a current of 500 mA running through it. The first resistor has a resistance of 250 ohms, the second resistor has a resistance of 200 ohms, and the last three resistors each have a resistance of 100 ohms. What is the total applied voltage of the circuit?

375 volts

Always connected in series in a circuit

ammeters

If a 10-kilohm resistor and a 150-ohm resistor are connected in series, what is the total resistance?

10,150 ohms or 10.15 kilohms

If 100 amps of current enters a series circuit with four resistors, how much current remains after passing through the fourth resistor?

100 amps

If a series circuit has five resistors, and there is a voltage drop of 20 volts across each resistor, what is the applied voltage of the circuit?

100 volts

If a 270-ohm resistor and a 1-kilohm resistor are connected in series, what is the total resistance?

1270 ohms

A current of 100 mA runs through a series circuit with four resistors at an applied voltage of 80 volts. The voltage drop of the first resistor is 30 volts, and the voltage drops for the remaining three resistors are 10 volts each. What is the total resistance in this circuit?

600 ohms

As current passes through a resistor, it speeds up.

False

IR drop refers to a loss of current between resistors in a series circuit.

False

If a series circuit has four resistors with different values, and you know the total current and the value of one resistor, you can calculate the applied voltage.

False

If a series circuit has three resistors, and each resistor has a value of 100 ohms, then the total resistance of the series circuit is 100 ohms.

False

If ammeters are placed at several locations along a long series circuit, each will give a different reading.

False

If the applied voltage of a series circuit with three resistors is 100 volts, and the first resistor has a value of 50 ohms, and the second resistor has a value of 25 ohms, then the third resistor must have a value of 50 ohms.

False

If there are three resistors on a series circuit, each with a resistance of 10 ohms, and there is a current of 5 amps running through the circuit, then the total voltage drop for the circuit is 6 volts.

False

Increased resistance increases the current in a series circuit.

False

The applied voltage for a series circuit refers to how much voltage is left after the current has passed through all the resistors in the circuit.

False

A series circuit has a constant voltage applied to it. If the circuit resistance is lessened, the current will _____.

Increase

Adding the values of all the voltage drops that occur along a series circuit will give you the applied voltage.

True

If 50 amps of current passes through the first resistor on a series circuit, then 50 amps of current will pass through the last resistor on the same circuit.

True

If the value of any resistor in a series circuit changes, then the total current in the circuit will also change.

True

If the voltage at the beginning of a series circuit is 50 volts, and there is a loss of 10 volts after the first resistor, then the voltage between the first resistor and the second resistor is 40 volts.

True

Voltmeters should be connected in parallel when measuring voltage drop.

True

When unplugging an appliance, it is safest to pull on the plug, not the cord.

True

When resistors are connected in series, _____.

total resistance increases

The same amount that flows in must flow out

current

None are lost while moving through a circuit

electrons

Causes loss of voltage

resistance

The current in a series circuit is the _____.

same at all points in the circuit

Can determine the chemical composition of various materials

spectrometer

Total resistance in a series circuit equals the _____.

sum of all the resistors

A series circuit is a circuit _____.

that has multiple resistors on the same conductor

Kirchhoff's current law states that whatever current flows into a junction, _____.

the same amount of current must flow out

Kirchhoff's voltage law states that the sum of the voltage drops in a circuit must equal _____.

the source or applied voltage

Resistance in a series circuit is determined by the total circuit voltage divided by the _____.

total circuit current

Current in a series circuit is determined by the total circuit voltage divided by the _____.

total circuit resistance