GATE IN 2025 Question Paper (01-Feb-2025) (Shift 2)

A chopper amplifier shown in the figure is designed to process a biomedical signal $V_{in}(t)$ to generate conditioned output $v_{out}(t)$. The signals $V_{in}(t)$ and $v_{os}(t)$ are band limited to 50 Hz and 10 Hz, respectively. For the system to operate as a linear amplifier, choose the correct statement from the following options.

An 8-bit microprocessor has 16-bit address bus ($A_{15}\text{–}{A}_0$) where $A_0$ is the LSB. As shown in Figure (a), it has a pre-installed 4 KB ROM whose starting address is 0000 H. The processor needs to be upgraded by adding a 16 KB RAM as shown in Figure (b). The address range for the newly added RAM is

A 3-bit DAC is implemented using ideal opamp and switches as shown in the figure. Each of the switches gets closed when its corresponding digital input is at logic 1. For a digital input of 110, the resistance $R_{in}$ seen from the reference source and the current $I$, are

Power consumed by a three-phase balanced load is measured using two-wattmeter method. The per-phase average power drawn by the load is 30 kW at $\frac{\sqrt{3}}{2}$ lagging power factor. The readings of the wattmeters will be

The bridge circuit, shown in Figure (a), can be equivalently represented using the circuit shown in Figure (b). The values of $R_1$, $R_2$, and $V_C$ in the equivalent circuit are