1.A single-phase inverter is fed from a 100 V dc source and is controlled using a quasi-square wave modulation scheme to produce an output waveform, v(t), as shown. The angle is adjusted to entirely eliminate 3rd harmonic component from the output voltage. Under this condition, for v(t), the magnitude of the 5th harmonic component as a percentage of the magnitude of the fundamental component is ______ (rounded off to 2 decimal places).

2.Consider a signal x[n] = (1/2)n1[n], where 1[n] = 0 if n < 0, and 1[n] = 1 if n 0. The z-transform of x[n - k], k > 0 iszk112z1with region of convergence being?

3.Thyristor T1is triggered at an angle (in degree), and T2at angle 180 + , in each cycle of the sinusoidal input voltage. Assume both thyristors to be ideal. To control the load power over the range 0 to 2 kW, the minimum range of variation in is

5.A non-ideal Si-based pn junction diode is tested by sweeping the bias applied across its terminals form -5 V to +5 V. The effective thermal voltage, VT, for the diode is measured to be (29 2) mV. The resolution of the voltage source in the measurement range is 1 Mv. The percentage uncertainty (rounded off to 2 decimal places) in the measured current at a bias voltage of 0.02 V is

6.The Thevenin equivalent voltage, VTH, in V (rounded off to 2 decimal places) of the network shown below, is

7.In the dc-dc converter circuit shown, switch Q is switched at a frequency of 10 kHz with a duty ratio of 0.6. All components of the circuit are ideal, and the initial current in the inductor is zero. Energy stored in the inductor in mJ (rounded off to 2 decimal places) at the end of 10 complete switching cycles is

8.Currents through ammeters A2 and A3 in the figure are 110 and 170, respectively. The reading of the ammeter A1 (rounded off to 3 decimal places) is

9.A single-phase, 4 kVA, 200 V/100 V, 50 Hz transformer with laminated CRGO steel core has rated no-load loss of 450 W. When the high-voltage winding is excited with 160 V, 40 Hz sinusoidal ac supply, the no-load losses are found to be 320 W. When the high-voltage winding of the same transformer is supplied from a 100 V, 25 Hz sinusoidal ac source, the no-load losses will be _____ W (rounded off to 2 decimal places).

10.Which of the following is true for all possible non-zero choices of integers m, n ; m n, or all possible non-zero choices of real numbers p, q ; p q, as applicable ?