Three resistors connected in series carry currents labeled I 1 , I 2 and I 3 respectively. Which of the following expresses the total current, I t , in the system made up of the three resistors in series?

I t = (1I 1 + 1/I 2 + 1/I 3 ) -1

The current flowing in an electric circuit can be increased by:

increasing voltage or decreasing resistance.

decreasing voltage or increasing resistance.

increasing voltage and increasing resistance.

decreasing voltage and decreasing resistance.

An example of a wet cell battery is:

the battery in your flashlight.

In an electric circuit, charges:

do all of these answer choices.

get energy from an external source.

flow from higher potential to lower potential.

When one bulb in a series circuit containing several light bulbs burn out:

none of the other bulbs will light up.

nothing changes in the rest of the circuit.

When resistors are put in parallel with each other their overall resistance is:

smaller than the resistance of any of the resistors.

larger than that of any other resistor.

the same as the resistance of one of the resistors.

As the number of resistors in a parallel circuit is increased, what happens to the equivalent resistance of the circuit and total current in the circuit?

Equivalent resistance and total current increases.

Both equivalent resistance and total current decrease.

Equivalent resistance increases and total current decreases.

A series circuit consists of a switch, a 6.0 V battery and some copper wire. Whenever the circuit is turned on, each of these elements have the same:

potential difference across it.

Electrical Circuit Theorems and Conversions

Authored by Charles Martinez

Physics

9th Grade - University

NGSS covered

Electrical Circuit Theorems and Conversions

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MULTIPLE CHOICE QUESTION

10 sec • 1 pt

An electric circuit is a closed loop or pathway that allows electric charges to flow.

True

False

Tags

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A resistor is a device that converts chemical energy into electrical energy.

True

False

Tags

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A parallel connection is a type of electrical circuit in which there is a single current pathway.

True

False

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A series connection is a type of electric circuit in which there are multiple paths.

True

False

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A resistor is a device that controls current in electric circuits.

True

False

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

An electric current is a flow of charged particles.

True

False

Tags

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In alternating current, the motion of the charges:

continuously changes in the forward and reverse directions.

is equal to the speed of light.

is greater than the speed of light.

is in the same direction of the electric field.

Tags

NGSS.HS-PS2-5

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Electrical Circuit Theorems and Conversions

An electric circuit is a closed loop or pathway that allows electric charges to flow.

A resistor is a device that converts chemical energy into electrical energy.

A parallel connection is a type of electrical circuit in which there is a single current pathway.

A series connection is a type of electric circuit in which there are multiple paths.

A resistor is a device that controls current in electric circuits.

An electric current is a flow of charged particles.

In alternating current, the motion of the charges:

If a 75 W light bulb operates at a voltage of 120 V, what is the current in the bulb?

If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?

Three resistors with values of 4.0 Ω, 6.0 Ω and 8.0 Ω respectively, are connected in series. What is their equivalent resistance?

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