What type of current do batteries provide?
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Alternating current
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Mixed current
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Direct current
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Pulsed current
Which device is used for amplification of electrical signals?
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Capacitor
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Transistor
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Inductor
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Resistor
What kind of energy does a speaker convert electricity into?
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Light
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Mechanical
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Heat
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Sound
Which of the following devices is used in telecommunications?
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Blender
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Oscilloscope
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Electric kettle
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Microphone
Which device is used to convert DC to AC?
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Transformer
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Battery
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Inverter
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Rectifier
Which of the following is a household device that generates heat?
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Blender
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Refrigerator
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Fan
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Electric heater
Which of these devices uses electromagnetic induction to operate?
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Heater
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Transformer
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Resistor
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Capacitor
Which of the following is a renewable-powered electrical device?
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Diesel generator
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Solar panel
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Gas stove
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Microwave
Which device converts electrical energy into mechanical energy?
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Speaker
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Light bulb
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Motor
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Battery
What does a resistor do in a circuit?
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Controls current flow
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Increases voltage
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Stores energy
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Converts electricity to sound
