Charges, Current, and Ampere

If a conductor carries a current of 500 mA, what quantity of charge passes through a cross-section of the conductor in 2 minutes?

A device draws a current of 0.1 μA. How long will it take for $6.022 \times 10^{10}$ electrons to pass through the device?

If 3 A of current is flowing in a circuit with a potential difference of 12 V, how much work is done in 5 seconds?

A parallel plate capacitor with capacitance $C$ is charged to a potential difference $V$. What happens to the charge on the capacitor if the potential difference is doubled while the capacitance is halved?

In a system, 50 J of work is required to move a charge of 5 C from point A to point B. What is the potential difference between points A and B?

A power supply provides a constant current of 0.75 A to a load. How much charge is delivered in 1 hour?

How does increasing the potential difference across a conductor typically affect the electron flow, assuming constant temperature?

A battery is rated at 500 mAh (milliampere-hours). Theoretically, for how long could it continuously supply a current of 25 mA?

If a 12V battery does 360 J of work to move charge through a circuit, how much charge was moved?

Considering electron flow versus conventional current, what accurately describes their relationship in a simple circuit powered by a battery?

A metallic conductor's resistance is observed to decrease. Which of the following factors could account for this observation?

A wire's diameter is halved while maintaining constant length and material. How does this affect the wire's resistance?

In an experiment to verify Ohm's Law, why is it crucial to maintain a constant temperature?

Consider two wires made of the same material but with different dimensions. Wire A has a length L and cross-sectional area A, while wire B has a length of 2L and a cross-sectional area of A/2. What is the ratio of the resistance of wire B to wire A (R_B/R_A)?

A circuit contains three resistors connected in parallel. If one of the resistors is removed from the circuit, what happens to the equivalent resistance of the circuit?

What is the effect on total resistance if two identical resistors are placed in parallel, compared to if they were placed in series?

Consider a scenario where the potential difference across an electrical device is reduced to one-quarter of its initial value, while the device's resistance remains constant. According to Ohm's Law ($V = IR$), how does the electric current change?

A new material is discovered with a significantly lower resistivity than copper. How would replacing copper wires with this new material in electrical circuits primarily affect the circuit performance, assuming all other factors remain constant?

Given a material with resistance $R = 4$ ohms, length $L$, and area $A$, what is the resistance of a related material made of the same substance but with length $L/2$ and area $2A$?

Three wires made of the same material have different dimensions. Wire A has length $L$ and area $A$, wire B has length $2L$ and area $A$, and wire C has length $L$ and area $2A$. Rank the wires in order of increasing resistance.