Current and circuits game 1

Where do the electrons come from that produce heat and light in a light bulb that is plugged into an outlet in your house?

• The air

• The power company

• The bulb's wire filament

• The wall plug

Which statement best describes a parallel circuit?

• Current decreases as resistors are added

• The amount of current entering a branch must leave the branch

• The total resistance is the sum of all the resistors

• The total voltage drop through the circuit must equal the voltage supplied to the circuit

• The current stays the same at every point in the circuit

In order for there to be a flow of charge through a light bulb, there must be

• electrons flowing out of the light bulb

• electrons flowing into the light bulb

• voltage through the light bulb

• protons flowing into the light bulb

• a potential difference across the ends of the light bulb

How much voltage will Yamiley need to produce a 2 ampere current through a 79 ohm resistor?

• 158 Volts

• 0.03 Volts

• 75 Volts

• 39.5 V

• 77 Volts

How much current flows through a 81 ohm light bulb when Morgan connects it with a 120 volt source?

• 1.48 A

• 201 A

• 0.675 A

• 39 A

• 177.78 A

How is a parallel circuit different from a series circuit?

• A parallel circuit provides only one pathway for electric charges to flow

• The current in a series circuit is always more than the same set up in a parallel circuit

• The voltage needed is found by subtracting the current from the resistance

• The result when more resistors are added

• Only the parallel circuit needs a voltage source

Which of the following will increase a wire's electrical resistance?

• Make the wire cooler.

• Make the copper wire an aluminum wire.

• Make the wire longer.

• Make the wire thicker.

• Make the wire shorter.

Which of the following is correct about a series circuit?

• The current decreases as the resistance decreases.

• The voltage drop is equal to the current divided by the resistance.

• The current is found by taking the voltage and dividing it by the sum of the resistors.

• The current will be increased when the resistance increases.

• The current is found by taking the voltage and multiplying it by the sum of the resistors.

In order to get an electric current to flow, what does the voltage source provide to the circuit?

• The speeding up of the electrons

• The energy

• The magnitude of the electron flow

• The electrons

• The pull to move the electrons

According to Ohm's Law, as the voltage decreases in the circuit, what will happen to the power in the circuit?

• The change in power depends on the power

• The power will stay the same

• The power will increase

• The power will be unaffected

• The power will decrease