Unit 35 - Electrical Circuits II
Learning Outcomes:
- Be able to set up a simple electric circuit, use appropriate instruments to measure current, potential difference (voltage) and resistance, and establish the relationship between them (OP50)
- Perform simple calculations based on the relationship between current, potential difference (voltage), and resistance (OP52)
- Distinguish between direct and alternating current; recall that the voltage of the mains supply is 230 volts a.c. (OP54)
- Recall that the unit of electrical energy used by electricity supply companies is the kilowatt-hour, and calculate the cost of using common electrical appliances, based on their power rating (OP55)
- Describe how to wire a plug correctly, and explain the safety role of a fuse or circuit breaker in domestic electrical circuits (OP56)
- Understand that a diode is a device that allows current to flow in one direction only, and that a light emitting diode (LED) requires less current than a conventional bulb (OP57)
- Set up simple series circuits using switches, buzzers, LEDs and resistors (OP58)
- Measure the resistance of a light-dependent resistor (LDR) under varying degrees of brightness of light (OP59)
- Identify everyday applications of the diode, including the LED, and of the LDR (OP60)