Electric Circuits Flashcard

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as V = I × R.

Front

What is the formula to calculate voltage?

Back

Voltage (V) can be calculated using the formula V = I × R, where I is the current in amperes and R is the resistance in ohms.

Front

What happens to current in a series circuit?

Back

In a series circuit, the current remains the same throughout all components. However, the total voltage is divided among the components.

Front

What happens to current in a parallel circuit?

Back

In a parallel circuit, the total current is the sum of the currents through each parallel branch. Each component receives the full voltage.

Front

What is resistance?

Back

Resistance is a measure of the opposition to the flow of electric current, measured in ohms (Ω).

Front

How does increasing resistance affect current?

Back

Increasing resistance decreases the current flowing through a circuit, according to Ohm's Law.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It typically consists of a coil of wire wrapped around a ferromagnetic core.

Front

What factors affect the strength of an electromagnet?

Back

The strength of an electromagnet can be increased by increasing the number of wire turns, increasing the current, or using a stronger core material.

Front

What is the unit of electric current?

Back

The unit of electric current is the ampere (A).

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, and the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, and the current can split among the branches.