Question 1
Convert the complex number into polar form 6-j9.

Question 2
Find the value of impedance Z₂ in the series circuit.

Question 3
Using KVL calculate the voltage across the resistance of 5Ω if it is in series with an inductance of 0.02H and connected across a 100 V, 40Hz supply.

Question 4
If a current of 70∠-25° mA passes through the impedance Z₁ = 90∠40°Ω, find the current passed through the impedance Z₂ = 35∠50°Ω using Cartesian co-ordinates.

Question 5

Find the current passing through a branch whose impedance is Z = (7 + j7) when a voltage of V = 150V is applied.

Question 6

If the voltage V= 80V, 50Hlis applied across a coil of resistance of 10Ω and inductance of 30mH find the magnitude of the impedance.

Question 7
For the circuit shown below, find the value of V_I.

Question 8
Calculate the impedance value (in phasor notation) for the following circuit (assume f = 1000Hz).

Question 9
Calculate the impedance value (in phasor notation) for the following circuit (assume f = 1000Hz). Would this cicuit use more power at high or low frequencies?

Question 10
A voltmeter placed across a 90 resistor reads 20V as shown in the figure below. Calculate the ammeter reading and the phase angle of the current I.