Abeka 9th Science Quiz 22

What device emits light from a filament heated to extremely high temperature?

• Halogen lamp
• Fluorescent tube
• Incandescent light bulb
• LED light bulb

What semiconductor device emits light at a low temperature when direct current is applied?

• Light Emitting Diode (LED)
• Resistor
• Transistor
• Capacitor

What is the most common type of electrostatic generator in use today?

• Wimshurst machine
• Crown generator
• Faraday generator
• Van de Graaff generator

What was an early device used to store electric charge?

• Capacitor
• Resistor
• Inductor
• Leyden jar

What is a simple device that converts electricity to back-and-forth motion?

• Electric generator
• Wind turbine
• Piston pump
• Solenoid

What is an electric switch operated by an electromagnet?

• Inductor
• Relay
• Capacitor
• Transistor

What is a modern device used to store static electric charge called?

• inductor
• transformer
• resistor
• capacitor

What type of electric motor needs a commutator to reverse the current in the armature?

• AC motor

• DC motor

• Stepper motor
• Synchronous motor

What is an electrostatic method of reproducing images on paper?

• Xerography

• Lithography
• Screen Printing
• Digital Printing

What is the device that converts electricity into sound waves?

• Microphone
• Amplifier
• Loud speaker

• Transmitter