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The 3 parts of an electronic system are : 0% 0% 0% 0% 1. 2. 3. 4. 10 Seconds Remaining Input , Output and Throughput Output , Process and Throughput Process , Output and Throughput Input, Process and Output All output devices turn : 0% 0% 0% 0% 1. 2. 3. 4. 20 Seconds Electrical energy into sound energy Remaining Sound into electrical energy Light into electrical energy Electrical energy into some other form Loudspeakers : 20 Seconds Remaining 0% 0% 0% 0% 1. Turn electrical energy into sound and can be used in a DVD recorder 2. Turn sound into electrical energy and can be used in a television 3. Turn sound into electrical energy and can be used in a DVD recorder 4. Turn electrical energy into sound and can be used in a television The main energy change in an electrical motor is : 15 Seconds Remaining 0% 1. Electrical energy into kinetic energy 2. Electrical energy into kinetic and sound 0% energy 0% 3. Electrical energy into kinetic , heat and sound energy A relay is : 0% 0% 0% 0% 1. An analogue device which uses a small current to switch a bigger one on 2. A digital device which uses a large current to switch a smaller one on 3. A digital device that uses a small current to switch a larger one on 4. An analogue device that uses a large current to switch a smaller one on :20 The most suitable output device to lock all the doors in central locking system is : 0% 0% 0% 0% 1. 2. 3. 4. Led , Analogue Solenoid, Digital 7 segment display, Digital Relay, Digital 20 Seconds Remaining LEDs : 0% 0% 0% 0% 20 Seconds Remaining 1. Turn electrical energy into light and give out lots of colours of light 2. Turn electrical energy into light and can be connected either way in a circuit 3. Turn electrical energy into light and have a lens fitted to them 4. Turn electrical energy into light and heat energy LEDs have a protecting resistor fitted to : 0% 0% 0% 0% 20 Seconds Remaining 1. Increase the size of the current 2. Control the size of the current flowing through the LED 3. Increase the voltage across the LED 4. Complete the circuit The voltage across the LED is: 1. 6 V 2. 0V 3. 4.1 V 4. 0.9V 9V 0% 0. 1 V 0% 4. 0% 0V 6 V 0% 90 A current of 20 mA flows through the LED when the voltage across it is 2V. Calculate the value of the protecting resistor when the LED is wired to a 6V supply. 0% 1. 100 Ω 2. 0.01 Ω 0% 3. 200 Ω 0% 4. 300 Ω 0% 90 7 segment displays are 0% 0% 0% 0% 1. 2. 3. 4. 20 Seconds Remaining Analogue devices used in monitors Digital devices used in DVD recorders Analogue devices used in DVD recorders Digital devices used monitors