Question

Assume you are given two resistors with resistances R₁=4.0 kΩ and R₂=6.0 kΩ and two capacitors with capacitances C₁=4.0 µF and C₂=6.0 µF.

a)      Calculate the equivalent resistances R_eq and the equivalent capacitance C_eq if the resistors are connected in parallel and the capacitors are connected in series.

b)      Now, use the R_eq and C_eq that you calculate in part (a) to construct an RC circuit. If an emf of 27 V is suddenly applied across R_eq and C_eq, calculate the charge on the C_eq after t= 12 µs.

c)      If the resistor R₁ is made of iron wire with radius R= 3 mm, calculate the length of this wire. The resistivity of iron is ρ_iron= 9.68x10^-8 Ω.m.

d)      If the capacitance C₂ has square parallel-plates with the separation of 0.3 mm, calculate the plate area A.

Answer 1