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- For figure (1)draw and calculate the voltages waveform across each half of secondary winding and across load when 100sin2π60t applied across the primary, then find PIV.Calculate rms current amplitudes for the complex circuitA. The value of: A=5 ms C= 15 ms Peak to peak = 10 B D Figure 1 (a) From Figure 1 above, identify the frequency (f), value of time at A, B, C, D, period (T) and the RMS.
- 2. A triangular voltage source has a peak value of 10 V. What is the computed RMS value of this source? a. 3 V b. 4 V c. 5 V d. 6 V 3. In Question 2, if the source is measured by an analog meter, will it show the correct RMS value? a. Yes b. NoThe concentration ratio of parabolic trough power plant is typically O a. from 30 to 40 O b. more than 1500 O c. less than 10 O d. from 10 to 203-9 An rms ac voltmeter and a peak-to-peak-reading ac voltmeter are to be used to determine whether three ac signals are sinusoidal. Deter. mine whether the signals are sinusoidal if the following readings are obtained First signal Second signal Third signal peak-to-peak reading = 35.26 V rms reading. - 12.00 V peak-to-peak reading - 11.31 V rms reading = 4.00 V peak-to-peak reading = 25.00 V rms reading -8.83 V
- Which cannot be said since Z is an inductive load in the circuit given below? A) load voltage period is 0.02sec. B) Load voltage peak value is 311V. C) Load voltage frequency is 50Hz D) Load voltage average value is 220V.1. A load of 50 ohms resistance and 0.4 H inductance are connected in series to 100 volts, 60 hz a-c source. What must be the value of the capacitance to be connected in parallel to the circuit to raise the power factor to 0.96 lagging. Draw the circuit diagram.A triangle waveform with following specifications in Table B1. Table B1 RMS Voltage 50mV Number of cycles/second 100 i) Sketch the approximate triangular waveform with all specifications. ii) A transformer has primary coil with 100 turns and secondary coil with 120 turns. Estimate the current in the secondary coil, If the current in the primary coil is 4 Ampere
- FIND THE VALUES INDICATED AND SHOW THE COMPLETE SOLUTION. RMS Value Phase Instantaneous Value Peak Average Value Value Angle (a) 45 A ? 45° (b) ? 220 V ? 60°Consider the switching waveforms shown below, operating with a duty-cycle of 30%. Which statements correctly describe the switching circuit, load and circuit operation? (Multiple answers possible, but wrong answers will deduct marks) Voltage across load Voltage (V) 000 120 0000 100 80 60 40 20 30 Time (us) The load must be predominantly resistive. The average current in the load is 1.0A. The RMS current in the load is approximately 1.414A. The load must be predominantly inductive. The resistive part of the load is 200ohms. The average current in the load is 0.6A. O The resistive part of the load is 50ohms. 0 0 10 20 40 50 60 Current (A) 2 5 0.5 0 0 10 Current through load 20 W 30 Time (us) 40 50 605. An alternating current varying sinusoidally with a frequency of 50 Hz has an rms value of 20 A. a) Determine the instantaneous value at 0.0025 seconds. b) Determine the instantaneous value, 0.0125 seconds after passing through a positive maximum value. c) At what time, measured from a positive maximum value, will the instantaneous current be 14.14 A?