Physics Flashcards
What is the unit of electric current?
The unit of electric current is the ampere (A)
Define voltage in terms of electrical circuits.
Voltage is the electrical potential difference between two points in a circuit, measured in volts
What is the resistance of a circuit, and what is its unit?
to the flow of electric current, measured in ohms (Ω).
State Ohm’s Law.
Ohm’s Law states that voltage (V) is equal to the product of current (I) and resistance (R): V = I * R.
What is the function of an electric circuit breaker
A circuit breaker is designed to interrupt the flow of electric current in case of overloads or short circuits, protecting the circuit.
Define electric power.
Electric power is the rate at which electrical energy is transferred or converted, measured in watts
How is electric power related to voltage and current?
Electric power (P) is the product of voltage (V) and current
Explain the difference between series and parallel circuits.
In a series circuit, components are connected end-to-end, while in a parallel circuit, components have separate branches.
What is the purpose of an electric fuse in a circuit?
An electric fuse is a safety device that breaks the circuit when the current exceeds a certain limit, preventing damage to components.
Define the term “resistor” in the context of electricity.
A resistor is a component that introduces resistance into an electric circuit to control the flow of current.
What is the role of an insulator in an electrical system?
An insulator is a material that does not conduct electricity, preventing the flow of electric current and ensuring electrical safety.
Explain the concept of electric current flow in a conductor.
Electric current flows from the positive to the negative terminal in a conductor, opposite to the flow of electrons.
How does a voltmeter differ from an ammeter?
A voltmeter measures voltage across a component, while an ammeter measures the current flowing through a component.
