Year 2024

Week # 1 Quiz 1

Q1. An electric iron is marked as 230 V, 800 Watt. How many units of electrical energy are consumed if it is used for 10 hours ?

Q2. In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor

Q3. A 100 watt light bulb burns on average 10 hrs/day for one week. The weekly consumption of energy will be_______kwh.

Q4. A capacitor of capacitance \(C\) farad is connected in parallel with a resistance of \(R\:\Omega\). An AC voltage of \(V\) volt supplied across the circuit. if the current flowing through resistance is equal to \(I_R\) and current flowing through the capacitors is equal to \(I_C\). What is the value of the total current flowing through the circuit?

Q5. The voltage drop across \(15\:\Omega\) resistor is:

Q6. A star circuit has element of resistance \(10\:\Omega\). The equivalent delta elements will be

Q7. Five cells are connected in series in a row and then four such rows are connected in parallel to feed current to a resistive load of 1.25 \(\Omega\). Each cell has an emf of 1.5 V with internal resistance of 0.2 \(\Omega\). The current through the load will be

Q8. Two wattmeters connected to measure power in a three-phase balanced load, if the reactive power input is 7.5 KVAR and power factor of the load is 0.8. Calculate the total power input.

Q9. A series RLC circuit has \(R = 2\:\Omega\), \(L=1\:H\) and \(C =1\:F\) respectively. If \(V_m = 230\:V\), the current \(I_m\) at resonance is______.

Q10. The effective impedance of a series RLC circuit under resonance is equal to ______.