NEW
Font size
WorksheetsA C Circuits 2
Total questions: 12
Worksheet time: 6mins
What is Ohm's Law and how is it expressed mathematically?
Ohm's Law is expressed mathematically as V = I * R.
V = R / I
R = V - I
I = V + R
If a circuit has a voltage of 12V and a resistance of 4Ω, what is the current flowing through the circuit?
3A
2A
6A
4A
In a series circuit, how does the total resistance compare to the individual resistances?
The total resistance is greater than the individual resistances.
The total resistance is equal to the sum of the individual resistances.
The total resistance is the same as the largest individual resistance.
The total resistance is less than the smallest individual resistance.
What happens to the total current in a parallel circuit when more branches are added?
The total current increases when more branches are added.
The total current decreases when more branches are added.
The total current fluctuates randomly with added branches.
The total current remains the same regardless of branches added.
Define capacitance and its unit of measurement.
Capacitance is measured in farads (F).
Capacitance is measured in volts (V).
Capacitance is measured in ohms (Ω).
Capacitance is measured in amperes (A).
What is the role of an inductor in a circuit?
An inductor converts electrical energy into heat.
An inductor amplifies current in a circuit.
An inductor stores energy and resists changes in current in a circuit.
An inductor acts as a short circuit for high frequencies.
How does the total capacitance change when capacitors are connected in series?
The total capacitance fluctuates based on voltage.
The total capacitance decreases.
The total capacitance increases.
The total capacitance remains the same.
What is the formula for calculating the total resistance in a parallel circuit?
R_total = R1 * R2 * R3 * ... * Rn
R_total = R1 + R2 + R3 + ... + Rn
1/R_total = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn
1/R_total = R1 - R2 - R3 - ... - Rn
Explain the difference between alternating current (AC) and direct current (DC).
AC reverses direction periodically; DC flows in one direction only.
AC is always safer than DC.
DC can be used for long-distance power transmission.
AC is generated by batteries while DC is generated by generators.
What is the effect of increasing the frequency on the inductive reactance of a circuit?
Inductive reactance is only affected by voltage, not frequency.
Increasing the frequency has no effect on the inductive reactance.
Increasing the frequency decreases the inductive reactance.
Increasing the frequency increases the inductive reactance.
How do you calculate the energy stored in a capacitor?
E = 1/2 * C * V^2
E = 1/2 * C * V
E = C * V^2 / 2
E = C * V
What is the relationship between voltage, current, and resistance in a circuit according to Ohm's Law?
Voltage (V) = Resistance (R) / Current (I)
Resistance (R) = Voltage (V) - Current (I)
Voltage (V) = Current (I) * Resistance (R)
Current (I) = Voltage (V) + Resistance (R)
