GATE EE 2014 Question Paper (01-Mar-2014) (Shift 2)

A cascade of three identical modulo-5 counters has an overall modulus of

In the Wein Bridge oscillator circuit shown in figure, the bridge is balanced when

The magnitude of the mid – band voltage gain of the circuit shown in figure is (assuming h${}_{fe}$ of the transistor to be 100)

The figure shows the circuit of rectifier fedfrom a 230V (rms), 50Hz sinusoidal voltage source. If we want to replace the current source with a resistor so that the rms value of the current suppliedby the voltage source remains unchanged the value of resistance (in ohms) is ------ (Assume diodes to be ideal)

Figure shows 4 electronic switches (i), (ii), (iii) and (iv). Which of the switches can blockVoltages of either polarity(applied between terminals ‘a’ and ‘b’) when the active device is in OFF state?