GATE 2022 Rapid Revision Quiz 8

Find the factor by which signal to quantization noise ratio will increase if number of bits in a PCM system is increased from n to n + 3.

A man rows to a place 62 km away and comes back in total 10 hours 20 minutes. He found that he could row 8 km with the stream in the same time as he can row 4 km against the stream. Find the rate of flow of the stream :

Six identical fair dice are thrown independently. Let X denote the number of dice showing even numbers on their upper faces. Then the variance of the random variable X is_________

A 3-bit modulo-8 ripple counter using JK flip-flops has to be operated using a clock signal of frequency 20 MHz. If the propagation delay of all the flip-flops are assumed to the equal, then the maximum propagation delay (in ns) of each flip-flop for proper operation of the counter is

A broadside array consisting of 8 isotropic radiators has directivity of 6dB. Determine the minimum spacing between the elements.

In the circuit shown below the transistor parameters are = 1.7V and.

If I_D=0.8mA and V_D=1V, then value of resistor R_S and R_D are respectively?

For the BJT Q₁ in the circuit shown below, β = ∞, V_BEon = 0.7 V, V_CEsat = 0.7 V. The switch is initially closed. At time t = 0, the switch is opened. The time t at which Q₁ leaves the active region is