Questions and Answers
What is the purpose of a circuit breaker in an electric circuit?
The purpose of a circuit breaker in an electric circuit is to protect the circuit from overcurrent or short circuit by automatically shutting off the flow of electricity.
Explain the difference between a parallel circuit and a series circuit in terms of current flow.
In a parallel circuit, the current has multiple pathways to flow through, so if one pathway is broken, the current can still flow through the other pathways. In a series circuit, the current has only one pathway to flow through, so if that pathway is broken, the current stops.
Match the following electrical components with their functions:
Resistor = Limits the flow of current in a circuit Capacitor = Stores and releases electrical energy Diode = Allows current to flow in one direction only Transformer = Changes the voltage of an alternating current
How does an electric fuse function in a circuit?
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Match the following electrical measurements with their units:
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Match the following electrical symbols with their components:
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Study Notes
Electrical Circuits and Components
- A circuit breaker is a safety device that automatically interrupts an electric circuit when there is an overload or short circuit, preventing damage to the circuit and reducing the risk of fire.
Series and Parallel Circuits
- In a series circuit, the current flows through each component in sequence, and if one component fails, the entire circuit is broken.
- In a parallel circuit, the current flows through multiple branches, and if one component fails, the other branches continue to operate independently.
Electrical Components and Functions
- Fuses: designed to melt and break the circuit when the current exceeds a certain level, preventing damage to the circuit.
- Other components: identify the functions of other components, such as resistors, capacitors, and inductors.
Electric Fuses
- An electric fuse functions by melting and breaking the circuit when the current exceeds a certain level, preventing damage to the circuit.
Electrical Measurements and Units
- Voltage: measured in Volts (V)
- Current: measured in Amperes (A)
- Resistance: measured in Ohms (Ω)
- Power: measured in Watts (W)
Electrical Symbols and Components
- Identify the symbols for various electrical components, such as:
- Resistors: Ω
- Capacitors: C
- Inductors: L
- Switches: S
- Fuses: F
- etc.
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