DC Theory Lvl 2 lesson 4: How Voltage Functions in DC Series Circuits

20.3 volts

What is the total circuit voltage? (Round the FINAL answer to one decimal place.)

When voltage sources are connected in series, the total voltage is equal to the algebraic sum of the individual voltages.

True

Series-Opposing

Are the power sources in the circuit connected in a configuration?

12 volts Et= E1 + E2 6+6=12

Calculate the voltage that would be applied to a circuit connected with power sources as shown.

18 Volts E series - aiding E1 + E3 = 6+30=36 E series - opposing E2+E4 = 9=9= 18 ET= E larger - E smaller 36 - 18 = 18

Calculate the voltage that would be applied to a circuit connected with power sources as shown.

70 volts Et= E larger - E smaller 135 - 65= 70

Calculate the voltage that would be applied to a circuit connected with power sources as shown.

What is the formula for the total voltage applied to a series circuit when using two series-opposing power sources?

E total= E larger - E smaller

What is the formula which defines the voltage drop across loads in a series circuit?

E=IxR

In a circuit with two resistors in series, the voltage dropped across the resistor with the larger resistance value will be less than the voltage dropped across the resistor with less resistance.

False

When two batteries are connected as a series additive power source, they produce a voltage that is less than either of the batteries connected by itself.

False

When two batteries are connected as series additive power sources, the positive terminal of one battery is connected to the positive terminal of the other battery.

False

The total of the voltage drops across the loads of a series circuit can, in some instances, exceed the total of the source voltages applied to that circuit.

False (Voltage drops are expressions of energy loss in a circuit when current flows through the loads of that circuit. Since the source voltage provides that energy to the circuit, the amount of energy lost in the circuit cannot exceed that provided by the voltage source.)

200 Ω

Find the unknown value R1

120 Ω

Find the unknown value R3.

4 volts

Find the unknown value V2.

3 cells

Given the circuit and parameters shown, find the number of 6-volt batteries required in the circuit to provide a voltage drop of 7.2 volts across any two adjacent resistors. Hint: Do not round any sub-steps in your calculations. Number of batteries = ?

11.54volts

Given the circuit and parameters shown, solve for the voltage drop on R1, ER1/V1 = ? V. (Round the FINAL answer to two decimal places.)

3.5 volts

Given the circuit and parameters shown, solve for the voltage shown on voltmeter V2 in the circuit. V2 = ? V

As current increases in a series circuit, the voltage dropped across each load in that circuit will ? .

Increase

Calculate the voltage that would be applied to a circuit connected with power sources as shown.

Potential

70 volts, 10 volts, 20 volts

Solve for the voltage drop on R1, E(r1/v1) R2 E(r2/v2), and R3 E(r3/v3)

In a series circuit, loads which have the same voltage dropped across them will have ? .

The same resistance values

False E= I x R I = E/R I = 100/100 = 1 E1= 70 x 1 = 60 E2= 10 x 1 = 10 E3 = 20 x 1 = 20 R1= 70 R2= 10 R3= 20 So Yes the voltages dropped are equal to the voltage supplies

The total of the voltages dropped across the three resistors are not equal to the voltage supplied by the voltage source.

In a series circuit, the total or sum of all the voltages dropped across all of the circuit components is equal to the source voltage.

True

The total of the voltage drops across the loads of a series circuit can be less than the largest source voltage when more than one source voltage is connected.

True