current Quiz Practice Quiz | current

Q: What is the SI unit of electric current?

Ampere (A) — Ampere is the fundamental unit for measuring the rate of flow of electric charge.

Q: Electric current is the flow of what?

Electrons — Current results from the movement of negatively charged electrons in a conductor.

Q: What is the formula that relates current (I), charge (Q), and time (t)?

I = Q / t — Current is defined as the rate of flow of charge: I = Q/t.

Q: If 5 Coulombs of charge flow through a wire in 10 seconds, what is the current?

0.5 A — I = Q/t = 5 C / 10 s = 0.5 A

Q: Which of the following is a good conductor of electricity?

Copper — Copper has many free electrons, making it an excellent conductor.

Q: Current in a circuit is measured using what device?

Ammeter — An ammeter is specifically designed to measure current.

Q: In which type of circuit is the current the same throughout?

Series circuit — In a series circuit, there is only one path for the current to flow.

Q: Conventional current flow is defined as the flow of positive charge from which terminal to which terminal of a voltage source?

Positive to negative — Conventional current assumes positive charge flow from positive to negative.

Q: If the current in a circuit is 2 Amps and the voltage is 10 Volts, what is the resistance?

5 Ohms — Using Ohm's Law: R = V/I = 10 V / 2 A = 5 Ohms

Q: What is the effect of increasing the voltage applied to a circuit, assuming the resistance remains constant?

Increases the current — Increasing voltage directly increases current (Ohm's Law).

Question 1 of 15

What is the SI unit of electric current?

Ampere is the fundamental unit for measuring the rate of flow of electric charge.

Question 2 of 15

Electric current is the flow of what?

Current results from the movement of negatively charged electrons in a conductor.

Question 3 of 15

What is the formula that relates current (I), charge (Q), and time (t)?

Current is defined as the rate of flow of charge: I = Q/t.

Question 4 of 15

If 5 Coulombs of charge flow through a wire in 10 seconds, what is the current?

I = Q/t = 5 C / 10 s = 0.5 A

Question 5 of 15

Which of the following is a good conductor of electricity?

Copper has many free electrons, making it an excellent conductor.

Question 6 of 15

Current in a circuit is measured using what device?

An ammeter is specifically designed to measure current.

Question 7 of 15

In which type of circuit is the current the same throughout?

In a series circuit, there is only one path for the current to flow.

Question 8 of 15

Conventional current flow is defined as the flow of positive charge from which terminal to which terminal of a voltage source?

Conventional current assumes positive charge flow from positive to negative.

Question 9 of 15

If the current in a circuit is 2 Amps and the voltage is 10 Volts, what is the resistance?

Using Ohm's Law: R = V/I = 10 V / 2 A = 5 Ohms

Question 10 of 15

What is the effect of increasing the voltage applied to a circuit, assuming the resistance remains constant?

Increasing voltage directly increases current (Ohm's Law).

Question 11 of 15

Which of the following is NOT a unit of current?

Volt is a unit of voltage, not current.

Question 12 of 15

What is a short circuit?

A short circuit offers a path of very low resistance, allowing a large current to flow.

Question 13 of 15

In a parallel circuit, what is the relationship between the total current and the individual branch currents?

In parallel circuits, currents in branches add to the total current (Kirchhoff's current law).

Question 14 of 15

What instrument is used to measure the rate of charge flow in a circuit?

Ammeter is specifically designed to measure current in a circuit.

Question 15 of 15

What is the purpose of a fuse in an electrical circuit?

Fuses protect circuits from overcurrent by breaking the circuit if the current exceeds a certain value.

current Quiz