Q3. What is the current through a 12Ω resistor connected to a 36V source?
Solution:
Using Ohm's law, I = V/R = 36V / 12Ω = 3A.
⏱ Time: 0s
Q4. Using Kirchhoff's Voltage Law, what is the voltage drop across a 10Ω resistor if the total voltage in the loop is 20V and there is a 5Ω resistor in series?
Solution:
Using KVL, V_total = V_R1 + V_R2. V_R1 = 20V - (I * 5Ω). I = V/R = 20V / 15Ω = 1.33 A. V_R1 = 10Ω * 1.33 A = 13.33V.
⏱ Time: 0s
Q5. What is the electric field at a distance of 2 m from a point charge of +5 µC?
Solution:
E = k * |q| / r^2 = (8.99 x 10^9 N m²/C²) * (5 x 10^-6 C) / (2 m)^2 = 1.12 N/C.
⏱ Time: 0s
Q6. What is the potential difference across a capacitor of 5 µF charged to 10V?
Solution:
The potential difference across a capacitor is equal to the voltage it is charged to, which is 10V.
⏱ Time: 0s
Q7. What is the total capacitance of two capacitors, 4 µF and 6 µF, connected in series?
