Electric Circuits and Current Electricity

What is Ohm's Law?

• Ohm's Law defines power as P = I * R.

• Ohm's Law states that R = V / I.

• Ohm's Law is I = V + R.

• Ohm's Law is V = I * R.

How do you calculate resistance in a circuit?

• R = V - I

• R = V + I

• R = V / I

• R = I / V

What is the formula for power in an electrical circuit?

• P = I / V

• P = V + I

• P = V - I

• P = V × I

What happens to the total resistance in a series circuit?

• The total resistance is only affected by the voltage in the circuit.

• The total resistance decreases as more resistors are added.

• The total resistance increases as more resistors are added.

• The total resistance remains constant regardless of the number of resistors.

How does current behave in a parallel circuit?

• Current only flows through one branch in a parallel circuit.

• The total current in a parallel circuit is the sum of the currents through each branch.

• The total current is divided equally among all branches.

• The total current is the maximum current of any single branch.

What is the unit of electrical power?

• Watt

• Volt

• Ampere

• Ohm

Name three common components found in electrical circuits.

• Diode

• Transistor

• Transformer

• Resistor, Capacitor, Inductor

What is the difference between voltage and current?

• Voltage is the amount of electric charge; current is the potential difference.

• Voltage is the potential difference; current is the flow of electric charge.

• Voltage and current are the same concept in electricity.

• Voltage is the speed of electric charge; current is the resistance.

How do you measure voltage in a circuit?

• Use a voltmeter and connect its probes across the points of interest in the circuit.

• Connect a battery directly to the circuit points.

• Measure voltage by checking the current flow in the circuit.

• Use a multimeter set to resistance mode.

What is the role of a resistor in a circuit?

• To increase the current flow in a circuit.

• The role of a resistor in a circuit is to limit current and control voltage.

• To convert electrical energy into heat without any control.

• To store electrical energy for later use.