Electric Circuits and Capacitors

Flashcards covering key concepts related to electric circuits, current, charge, and capacitors.

What is the formula to calculate current in a conductor?

I = Q / Δt, where I is current, Q is charge, and Δt is time interval.

If a current of 1.5 A passes through a conductor for 1.5 minutes, how much charge has passed?

135 C.

What is the direction of the electric force between two point charges with opposite signs?

Attractive.

If two charges of 3 × 10⁶ C and -2 × 10⁶ C are 0.5 m apart, what must be calculated?

The magnitude and direction of the force between them.

If two point charges experience a force of 0.4 N, what can be inferred about their separation?

It must be calculated using Coulomb's law.

For three point charges along a line, what is to be found regarding q2?

The net force on q2 due to q1 and q3.

How to determine the voltage across a circuit element when given energy absorbed and charge passing through?

Use the formula V = W/Q.

If a capacitor has a capacitance of 50 μF charged to 12 V, how much charge is stored?

600 μC.

How is capacitance calculated for a capacitor with given geometric dimensions and dielectric constant?

C = (ε₀ * ε_r * A) / d.

If an EV battery has a capacity of 60 kWh, what is the energy required for 80% charge?

48 kWh.

What is the voltage across a capacitor if the charge is 0.04 C and capacitance is 200 μF?

200 V.

If a smartphone battery of 4685 mAh charges at 1 A, how long to reach 80% capacity?

3.748 hours.

How to find the power absorbed or supplied by a circuit element?

P = V * I.