Quiz

Q1. If each branch of a delta circuit head impedance \(\sqrt3Z\), then each branch of the equivalent star circuit has impedance

Q2. In two wattmeter method if power factor is 0.5, then one of the wattmeter will read

Q3. The value of current I flowing through 2 \(\Omega\) resistance in the circuit below equals to______.

Q4. A \(120\:\Omega\) resistor is in parallel with a capacitor with a capacitive reactance of \(40\:\Omega\). Both components are across a 20 V AC source. What is the magnitude of the total current through the circuit?

Q5. An electric bulb rated 100 Watt, 240 V is connected to a 180 V supply. What will be the output of the bulb?

Q6. A 50 W electric light bulb is connected to a 200 V supply. Determine (a) the current flowing in the bulb and (b) the resistance of the bulb.

Q7. A 12 V source has an internal resistance of 90 \(\Omega\) . If a load resistance of 20 \(\Omega\) is connected to the voltage source, the load power, \(P_L\) is

Q8. The equivalent capacitance between the point A and B for the circuit shown in Fig. is

Q9. Double integration of a unit step function would lead to

Q10. In a two-source circuit, one source acting alone produces 20 mA through a given branch. The other source acting alone produces 15 mA in the opposite direction through the same branch. The actual current through the branch is