Please using laplace transform

5. The switch in the circuit below has been closed for a long time. At t = 0, the switch is opened. Using Laplace transform, perform the following tasks

a. Find , i.e. the current just before the switch is opened.

[5 mark]

b. Determine the currents and in the circuit after the switch is opened. [10 marks]

 Solve this question

Show that 𝑔(𝑡) = 2𝑡*e^(−3𝑎*t)*𝑢(𝑡) signal's fourier transform is equal to

𝐺(𝑗Ω) = 2/(3𝑎 + 𝑗Ω)

The load of an instrument transformer consisting of delicate moving elements of an ammeter, voltmeter and watt-meter is termed as (EE June 1990)

a. Transformer power

b. Instrument Impedance

c. burden

d. meter load

Single phase transformer 10kVA, 2200/220v, 50Hz has the following
configure:
R1=4Ω, X1=5Ω, Rfe=25kω, XM=4kω, R2=0.04 Ω, X1=0.05 Ω
The transformer operates at rated voltage and feeds rated load
with a power factor of 0.8 inductive. To be identified:
1. The voltage fluctuation and the degree of efficiency.
2. The excitation current of the transformer.
3. The energy it consumes in a 24-hour period (in kWh) if it works under a load of 16
hours a day and the rest he works without load.