GATE EE 2014 Question Paper (02-Mar-2014) (Shift 2)

A 3-bit gray counter is used to control the output of the multiplexer as shown in the figure (A₂ is MSB and A₀ is LSB). The initial state of the counter is 000₂. The output is pulled high. The output of the circuit follows the sequence

A hysteresis type TTL inverter is used to realize an oscillator in the circuit shown in the figure.



If the lower and upper trigger level voltages are 0.9 V and 1.7 V, the period (in ms), for which output is LOW, is ______

A 3-ϕ fully controlled converter is fed through the star-delta transformer as shown in the figure



The converter is operated at a firing angle of 30⁰. Assuming the load current (Iₒ) to be virtually constant at 1 p.u. and the transformer to be an ideal one, the input phase current waveform is

A diode circuit feeds an ideal inductor as shown in the figure. Given V${}_S$ = 100 sin (ωt), where ω = 100 π rad / s and L = 31.83 mH. The initial value of inductor current is zero. Switch s is closed at t = 2.5 mS. The peak value of inductor current i${}_L$ (in A) in the first cycle is (in A)

A single-phase voltage source inverter shown in figure is feeding power to a load. The triggering pulses of the devices are also shown in the figure.





If the load current is sinusoidal and is zero at 0, π, 2π…, the node voltage V${}_{AO}$ has the waveform