Review: Current Electricity (Easy)

What is electrical current?

• rate of change of voltage
• rate of change of resistance
• rate of flow of charge
• rate of flow of power

What is electrical current?

• rate of change of voltage
• rate of change of resistance
• rate of flow of charge
• rate of flow of power

What does 5 A refers to?

• 5 C of charge flows through a point in 1 s
• 5 V of electricity across 1 ohm of resistance
• 5 V of electricity causing 1 C of charge
• 5 C of charge flowing through a point

What is a unit for current?

• QV
• VR
• C/s
• CV

How much charge flows through the resistor in 4 s?

• 3 C

• 6 C

• 12 C

• 18 C

If 50 C of charge flows through a point in the electrical circuit in 10 s, what is the current passing through that point?

• 0.2 A
• 5 A
• 60 A
• 500 A

A cell containing 1200 C of charge is connected to a circuit. What is the time taken to discharge the cell given that the current in the circuit is 6 A?

• 0.005 h
• 200 h
• 200 s
• 7200 s

100 C of charge is stored in a cell. Given that 50% of the charge flows out of the cell in 10 s, what is the average rate of flow of charge out of the cell?

• 0.1 A
• 0.5 A
• 5 A
• 10 A

The potential difference across a resistor is 12 V. How much energy is given out by the resistor when 3 C of charge flows through the resistor?

• 0.25 J
• 2 J
• 4 J
• 36 J

3 J of energy is dissipated from a circuit when 6 C of charge flows through the cell. What is the emf of the cell?

• 0.5 V
• 2 V
• 4 V
• 18 V