KS3 Electricity

What kind of circuit is this?

• series
• parallel

What is a switch's function in a circuit?

• to make the current hotter or colder
• turn on and off the flow of current
• the pathway that current flows
• to add more power to the circuit

If bulb 1 burns out, what will occur?

• bulbs 2 and 3 will go out
• bulbs 2 and 3 receive more volts
• bulbs 2 and 3 will stay lit
• nothing will happen

Calculate the electric power of an electrical appliance of 20 V having a resistance of 10 ohms.
 
Remember: I=V/R and P=VI

• 200 W
• 80 W
• 2.5 A
• 79.20 KJ

Does this statement best describe a parallel or a series circuit.
 
When more light bulbs are added they all remain bright. 

• Parallel circuit
• Series circuit

Does this statement best describe a parallel or a series circuit.
 
Different currents flow through each resistor.

• Parallel circuit
• Series circuit

Three resistors, 6.0 ohm, 9.0 ohm, 15 ohm, are connected in parallel in a circuit. What is the equivalent resistance of this combination of resistors? 

• 30 Ohms
• 10 Ohms
• 2.9 Ohms
• 0.34 Ohms

Two 15 ohm resistors and three 25 ohm resistors  are connected in series with a 24 V battery. What is the current through each resistor? 

• 0.23 A
• 0.51 A
• 1.6 A
• 0.96 A 

Three resistors, 50 ohms, 100 ohms, 200 ohms, are connected in series in a circuit. What is the equivalent resistance of this combination of resistors? 

• 350 ohms
• 250 ohms
• 29 ohms
• 120 ohms 

Which of the following statements concerning resistors in series is true? 

• The voltage used by each resistor is the same.
• The rate at which charge flows through each resistor depends on its resistance.
• The current through each resistor is the same.
• The total current through the resistors is the sum of the current through each resistor.