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Q1) Find the current necessary to establish a flux of 1.5x10 Wb in the series magnetic circuit of Fig. 1.

Q1) Find the current necessary to establish a flux of 1.5x10 Wb in the series magnetic circuit of Fig. 1.

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Q1) Find the current necessary to establish a flux of 1.5x10 Wb in the series magnetic circuit of Fig. 1. Q2) A small industrial plant has a 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 at 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. 2, find the mathematical expression for the ve and i when the switch is on, after 6 ms, the switch is off, find the mathematical expression for the ve and i,s. Plot the waveforms of ve and ic. cast steel throughout 0.004 m N- 1 2 200 turns Area 2 x 10m Area for sections other than bg = 5 x 10 m2 = 0.3 m Ibe- l- 0.2m, - - 0.148m Fig.1. 3 kN ic 2kn Vc C0.5µF E 18 V Fig.2.
Transcribed Image Text:Q1) Find the current necessary to establish a flux of 1.5x10 Wb in the series magnetic circuit of Fig. 1. Q2) A small industrial plant has a 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 at 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. 2, find the mathematical expression for the ve and i when the switch is on, after 6 ms, the switch is off, find the mathematical expression for the ve and i,s. Plot the waveforms of ve and ic. cast steel throughout 0.004 m N- 1 2 200 turns Area 2 x 10m Area for sections other than bg = 5 x 10 m2 = 0.3 m Ibe- l- 0.2m, - - 0.148m Fig.1. 3 kN ic 2kn Vc C0.5µF E 18 V Fig.2.
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