Electricity and Magnetism

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 is represented by the formula V = IR.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A), often shortened to Amp.

Front

What is the formula to calculate voltage?

Back

Voltage (V) can be calculated using the formula V = IR, where I is the current in Amperes and R is the resistance in Ohms.

Front

What is a resistor?

Back

A resistor is an electrical component that limits or regulates the flow of electrical current in a circuit.

Front

What is the relationship between voltage, current, and resistance?

Back

The relationship is defined by Ohm's Law: V = IR, meaning voltage equals current multiplied by resistance.

Front

What is an electron?

Back

An electron is a subatomic particle with a negative electric charge, found in all atoms.

Front

What does a magnetic field represent?

Back

A magnetic field represents the area around a magnet where magnetic forces can be observed.

Front

What is the unit of resistance?

Back

The unit of resistance is the Ohm (Ω).

Front

How do you calculate the current flowing through a resistor?

Back

Current (I) can be calculated using the formula I = V/R, where V is the voltage across the resistor and R is the resistance.

Front

What is the effect of increasing resistance on current flow?

Back

Increasing resistance decreases the current flow, assuming voltage remains constant, according to Ohm's Law.