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Question

Q1) Find the current necessary to establish a flux of 1.5x10^6 Wb in the series magnetic circuit of Fig. Q2) A small industrial plant has an 8 kW heating load and a 15-KVA inductive load due to a bank of induction motors. The heating elements are considered purely resistive (Fp = 1) and the induction motors have a lagging power factor of 0.75. If the supply is 1000 V, 60 Hz, establish the power triangle for the load. Determine the capacitive element required to raise the power factor to 0.96. Compare the levels of current drawn from the supply. Q3) For the network of Fig, find the mathematical expression for the voltage and current when the switch is on. After ns, the switch is off, find the mathematical expression for the voltage and current. Plot the waveforms of Vc and ic. Cast steel throughout Qm = 20 turns Area X Area of sections other than 6: 3m0, 0.2m, 0.14804 3kâ„“? 2kâ„“2 0.5pF 18 V Fig-

          Q1) Find the current necessary to establish a flux of 1.5x10^6 Wb in the series magnetic circuit of Fig.
Q2) A small industrial plant has an 8 kW heating load and a 15-KVA inductive load due to a bank of induction motors. The heating elements are considered purely resistive (Fp = 1) and the induction motors have a lagging power factor of 0.75. If the supply is 1000 V, 60 Hz, establish the power triangle for the load. Determine the capacitive element required to raise the power factor to 0.96. Compare the levels of current drawn from the supply.
Q3) For the network of Fig, find the mathematical expression for the voltage and current when the switch is on. After ns, the switch is off, find the mathematical expression for the voltage and current. Plot the waveforms of Vc and ic.
Cast steel throughout
Qm = 20 turns
Area X
Area of sections other than 6: 3m0, 0.2m, 0.14804
3kâ„“?
2kâ„“2
0.5pF
18 V
Fig-

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