Honors Electricity & Magnetism

Front

What is the formula to calculate current (I) in a circuit?

Back

I = V / R, where I is current in amps, V is voltage in volts, and R is resistance in ohms.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

Front

What is the unit of electric current?

Back

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

Front

What does a resistor do in a circuit?

Back

A resistor limits the flow of electric current in a circuit.

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across the same voltage source, allowing multiple paths for current.

Front

What happens to the total resistance in a series circuit?

Back

The total resistance in a series circuit is the sum of the individual resistances.

Front

What happens to the total resistance in a parallel circuit?

Back

The total resistance in a parallel circuit is less than the smallest individual resistance.

Front

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

Back

Voltage (V) = Current (I) x Resistance (R).

Front

What is the effect of increasing resistance on current in a circuit?

Back

Increasing resistance decreases the current if the voltage remains constant.

Front

What is the role of a battery in a circuit?

Back

A battery provides the voltage needed to push current through the circuit.