Which is the best definition of current?

• the rate of flow of charge

• how much electricity is moving

• how fast the electrons move around the circuit

• how much energy each charge has

which is the best definition for potential difference

• the rate of flow of charge

• the energy per unit charge

• how hard it is for charges to flow

• how much push the battery gives the electrons

Which is true of a series circuit?

• current and voltage are both the same everywhere

• current adds, voltage is the same everywhere

• current is the same everywhere and voltage is shared

• current and voltage both add

Which is true of a parallel circuit?

• current and voltage are both the same everywhere

• current adds, voltage is the same everywhere

• current is the same everywhere and voltage is shared

• current and voltage both add

What is the potential difference across X?

• 6V

• 3V

• 2V

• 4V

Calculate the resistance of X.

(remember V = 6V)

• 12 ohms

• 3 ohms

• 0.67 ohms

• none of these

What is the current in Y?

• 3 A

• 2 A

• 1 A

• 5 A

Calculate the resistance of Y.

• 6 ohms

• 3 ohms

• 2 ohms

• 1 ohm

When the temperature of resistor X increases, its resistance increases.

What would happen to the potential difference across X

• increase

• decrease

• stay the same

When the temperature of resistor X increases, its resistance increases.

What would happen to the current in X?

• increase

• decrease

• stay the same