Electricity and Circuits Quiz

Which statement correctly describes conventional current flow?

• It moves in random directions.

• It flows from negative to positive.

• It flows from positive to negative.

• It follows the movement of electrons.

How does electron flow differ from conventional current?

• Electron flow and conventional current move in the same direction.

• There is no difference between electron flow and conventional current.

• Electron flow moves from negative to positive, while conventional current moves from positive to negative.

• Electron flow moves from positive to negative, while conventional current moves from negative to positive.

What happens to the resistance of a metallic conductor as temperature increases?

• It increases.

• It decreases.

• It remains constant.

• It fluctuates randomly.

What is the relationship between resistivity and conductivity?

• They are directly proportional.

• They are inversely proportional.

• They are not related to each other.

• They always have the same value.

Which statement correctly describes the relationship between the length of a wire and its resistance?

• Resistance is not affected by the length of the wire.

• Resistance decreases as the length of the wire increases.

• Resistance is directly proportional to the length of the wire.

• Resistance is inversely proportional to the length of the wire.

Which of the following correctly describes the I-V curve of an ohmic material?

• It fluctuates randomly.

• It has a parabolic shape.

• It is a curved line with increasing slope.

• It is a straight line passing through the origin.

What does the electromotive force (emf) of a source represent?

• The voltage drop across a resistor.

• The energy used by the circuit components.

• The difference in charge between two points.

• The total energy provided per unit charge by the source.

Which device is used to measure electric current in a circuit?

• Ammeter

• Ohmmeter

• Voltmeter

• Wattmeter

What is the unit of electrical resistance?

• Ampere (A)

• Ohm (Ω)

• Volt (V)

• Watt (w)

A phone battery stores a charge of 5400 coulombs. If the phone draws a constant current of 1.5A, how long will it take to fully discharge the battery?

• 2400 s

• 3600 s

• 5400 s

• 7200 s