# Round 1 Esdt-l2a Ncet 12-04

100 Questions | Attempts: 273
Share  Settings  • 1.
A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is
• A.

1.2 V

• B.

0 V

• C.

3 V

• D.

6 V

• 2.
When a fourth resistor is connected in series with three resistors, the total resistance
• A.

Increases

• B.

Increases by one-fourth

• C.

Decreases

• D.

Remains the same

• 3.
When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
• A.

Increases

• B.

Increases by one-third

• C.

Decreases by one-third

• D.

Decreases by the amount of current through the removed resistor

• 4.
There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage
• A.

Is 30 V

• B.

Is 6 V

• C.

Depends on the current flow

• D.

Depends on the resistor values

• 5.
The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates
• A.

48 W

• B.

12 W

• C.

8 W

• D.

3 W

• 6.
All the voltage drops and the source voltage added together in a series circuit is equal to
• A.

The total of the voltage drops

• B.

The source voltage

• C.

The total of the source voltage and the voltage drops

• D.

Zero

• 7.
If a 6 V and a 9 V source are connected series aiding, the total voltage is
• A.

3v

• B.

9v

• C.

6v

• D.

15v

• 8.
Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is
• A.

2A

• B.

3A

• C.

4A

• D.

7A

• 9.
If a 24 V and a 6 V battery are series opposing, the total voltage is
• A.

18v

• B.

30v

• C.

24v

• D.

20v

• 10.
To measure the current out of the second resistor in a circuit consisting of four resistors in series, an ammeter can be placed
• A.

At any point

• B.

At the negative terminal of the source

• C.

Between the third and fourth resistors

• D.

Between the second and third resistors

• 11.
What determines the total resistance in a series circuit?
• A.

The sum of the resistors

• B.

The largest resistor

• C.

The largest resistor minus the smaller

• D.

The smallest resistor

• 12.
A series circuit schematic is recognized because all the components are connected:
• A.

End to end in a "string"

• B.

Horizontally across the page

• C.

In a uniform vertical manner

• D.

Diagonally across the page

• 13.
If series resistors dissipate 16 mW, 107 mW, 146 mW, and 243 mW, what is the total power consumed by the circuit?
• A.

269 mW

• B.

128 mW

• C.

512 mW

• D.

1024 mW

• 14.
If two resistors have the same voltage drop in a series circuit, it means:
• A.

They are connected in parallel

• B.

The voltage has doubled

• C.

They are of unequal value

• D.

They are of equal value

• 15.
With a 900 V source, voltage is divided across 3 series resistors of 300 V, 280 V, and:
• A.

300 V

• B.

280 V

• C.

320 V

• D.

120 V

• 16.
When a battery is connected to a series circuit, it delivers current based only upon:
• A.

Total resistance

• B.

Average resistance

• C.

Primary/secondary difference

• D.

The polarity connections

• 17.
Resistance in a series circuit will:
• A.

Oppose current

• B.

Halve the power

• C.

Double the current

• D.

Control the voltage

• 18.
How will an open resistor affect a series circuit?
• A.

No current will flow in the circuit.

• B.

Current will flow around the open resistor.

• C.

Total resistance will decrease.

• D.

The open resistor will drop 0 V.

• 19.
Which equation determines individual resistor voltage drop?
• A.

I x R

• B.

V x I

• C.

2I x R

• D.

V x R

• 20.
The voltage drop across a series resistor is proportional to what other value?
• A.

Its own resistance

• B.

The amount of time the circuit is on

• C.

Wattage rating

• D.

Total resistance

• 21.
With 20 V applied, an 8-ohm resistor is in series with a lamp. When the lamp is removed, what voltage will be read across the lamp socket?
• A.

20v

• B.

0v

• C.

5v

• D.

8v

• 22.
In a series circuit, the voltage measured across a short will be:
• A.

The normal voltage drop

• B.

Zero volts

• C.

Source voltage

• D.

Infinite voltage

• 23.
If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?
• A.

11v

• B.

21v

• C.

0v

• D.

-11v

• 24.
Given a series circuit containing resistors of different values, which statement is not true?
• A.

The current through each resistor is the same.

• B.

The sum of the voltage drops across each resistive element will be equal.

• C.

The total resistance is the sum of the value of the resistors.

• D.

The voltage drop across each resistor is the same.

• 25.
A series circuit current:
• A.

Remains the same through each component

• B.

Is the same as the individual resistances

• C.

Varies through each component

• D.

Is subtracted by each component

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