Lesson T4.3.1
T4.3.1 Powering advanced electrical systems Quiz: KS3 Design & Technology, Unit 4
20 questions
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Lesson T4.3.1, Powering advanced electrical systems: 20 multiple choice questions for the KS3 Design & Technology (National Curriculum), Unit 4: Technical knowledge, written with Revision Ninja.
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The 20 questions
-
Which component stores energy chemically and supplies a steady direct current?
- Resistor
- Capacitor
- Transformer
- Battery
-
What is the total voltage of two identical 1.5 V cells connected in series?
- 1.5 V
- 4.5 V
- 6 V
- 3 V
-
In a parallel circuit, what is the voltage across each identical branch?
- Zero voltage
- Half supply voltage
- Double supply voltage
- Supply voltage
-
What happens to the resistance of an LDR when light intensity increases?
- It doubles
- It increases
- It stays zero
- It decreases
-
Which component only lets current flow in one direction and emits light?
- LED
- Diode
- Thermistor
- Transistor
-
Which circuit component has a resistance that changes with temperature?
- Resistor
- Fuse
- Thermistor
- Capacitor
-
What type of device converts electrical energy into light, sound, or movement?
- Power source
- Input device
- Control unit
- Output device
-
What is the current through a 300 ohm resistor connected to a 9 V supply?
- 0.33 A
- 0.03 A
- 33.3 A
- 2700 A
-
A circuit has two identical resistors in series. What is the total resistance if each one is 100 ohms?
- 200 ohms
- 10000 ohms
- 50 ohms
- 100 ohms
-
What is the total resistance of two identical 100 ohm resistors in parallel?
- 200 ohms
- 50 ohms
- 100 ohms
- 25 ohms
-
In a transistor switch circuit, what does a small base current control?
- Input resistance
- Collector current
- Source frequency
- Supply voltage
-
What main form of energy does an electric motor convert electrical energy into?
- Light energy
- Thermal energy
- Chemical energy
- Kinetic energy
-
Which input component is best used to detect temperature changes in a smart circuit?
- Light-dependent resistor
- Thermistor
- Potentiometer
- Piezo buzzer
-
Which output component is used in a circuit to produce an audible warning sound?
- Transistor
- Resistor
- Buzzer
- Capacitor
-
Which component acts as a variable resistor to control settings like volume?
- Potentiometer
- Thermistor
- Diode
- Fuse
-
What component allows a small control current to switch a larger current circuit?
- Resistor
- LED
- Relay
- Capacitor
-
Which safety component breaks a circuit permanently if the current becomes too high?
- Capacitor
- Fuse
- Transistor
- Thermistor
-
What happens to the remaining lamps if one lamp breaks in a parallel circuit?
- They stay lit
- They flash
- They all go out
- They dim
-
Which circuit component is primarily used to temporarily store electrical charge?
- Capacitor
- Inductor
- Diode
- Relay
-
Why is a resistor placed in series with an LED in a circuit?
- To store charge
- To generate sound
- To increase voltage
- To limit current
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