Building Circuits

LED lights work by emitting light when electricity passes through them due to electroluminescence, not by emitting sound, projecting images, or generating heat.

A resistor is indeed a component used to control the amount of electricity flowing in a circuit by resisting the flow of electric current.

The correct answer is b) Potentiometer because it is a type of variable resistor commonly used to control electrical resistance in a circuit.

The correct answer is a photocell, which is a device that generates voltage or current when exposed to light. A resistor, integrated circuit, and capacitor are electronic components with different functions and symbols.

A diode's main function is to allow current to flow through it in one direction only, acting as a one-way valve for electrical current.

An SCR, or Silicon-Controlled Rectifier, is a semiconductor device that allows current to flow only after a positive voltage is applied to its gate. It is not used to store energy like a battery, but rather acts as a controllable switch for electrical currents.

The correct answer is c) Disc Capacitor. Disc capacitors are typically used in electronic circuits for applications such as filtering, coupling, and decoupling. Electrolytic capacitors, NPN transistors, and LED bulbs are different electronic components with their own distinct functions.

The symbol shown is commonly used to represent an Electrolytic Capacitor in electronic circuit diagrams. It is important to be familiar with various components' symbols to effectively design and understand circuits.

A NPN transistor works by amplifying current, not regulating voltage, storing data, or generating magnetic fields.

A PNP transistor works as a current amplifier by allowing a small current into the base terminal to control a much larger current flowing between the collector and emitter terminals.

The correct answer is b) Toggle switch because it is a type of switch that moves up and down to turn a circuit on and off.

The correct answer is a) Push switch. A push switch is a type of switch that only operates when it is pressed down, as opposed to a toggle switch which remains in a certain position until switched again, a PNP transistor which is a type of bipolar junction transistor, and a potentiometer which is a variable resistor used to control electrical devices.

The symbol represents a touch switch, which is a type of switch that is activated by physical touch instead of a traditional button or switch.

A speaker is specifically designed to convert electricity into sound waves, not light waves, text typing, or image projection.