Understanding Electrical Circuits

What is the unit of electric current?

• ohm

• volt

• watt

• ampere

What is the unit of voltage?

• Watt

• Joule

• Ampere

• Volt

What does a voltmeter measure?

• Electric potential difference (voltage)

• Power consumption in a device

• Resistance in a conductor

• Current flow in a circuit

What does an ammeter measure?

• Electric current

• Resistance

• Voltage

• Capacitance

What is the relationship between current and voltage in a circuit?

• Voltage is inversely proportional to current in a circuit.

• Voltage is directly proportional to current in a circuit, according to Ohm's Law.

• Voltage has no effect on current in a circuit.

• Current is independent of voltage in a circuit.

What is the formula for calculating electrical power?

• P = V × I

• P = V - I

• P = I / V

• P = V + I

What happens to current in a series circuit?

• The current is zero in a series circuit.

• The current varies at different points in a series circuit.

• The current is the same at all points in a series circuit.

• The current is higher at the beginning of the circuit.

What happens to voltage in a parallel circuit?

• The voltage is divided among the components in a parallel circuit.

• The voltage remains constant across all components in a parallel circuit.

• The voltage increases across each component in a parallel circuit.

• The voltage fluctuates randomly in a parallel circuit.

What is Ohm's Law?

• Ohm's Law states that R = V / I.

• Ohm's Law is I = V + R.

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

• Ohm's Law is V = I * R.

What is the effect of resistance on current flow?

• Resistance decreases current flow.

• Resistance has no effect on current flow.

• Resistance increases current flow.

• Resistance only affects voltage, not current.