BARC Quiz 1

Consider the figure shown below:

The value of voltage V₀ when terminals a and b are opened and the current through the terminals ‘a’ and ‘b’ when they are shorted will be respectively

The oscillator circuit shown in figure has n ideal inverting amplifier. Its frequency of oscillation (in Hz) is

Which of the following peripherals provide I/O facilities?
(i) 8279 (ii) 8155 (iii) 8259 (iv) 8255

In the circuit shown in figure, A is a parallel in, parallel–out 4–bit register, which loads at the rising edge of the clock C. The input lines are connected to a 4–bit bus, W. Its output acts as the input to a 16 × 4 ROM whose output is floating when the enable input E is 0. A partial table of the contents of the ROM is as follows :



The clock to the register is shown, and the data on the W bus at time t₁ is 0110. The data on the bus at time t₂ is

For an 8 feet (2.4 m) parabolic disk antenna operating at 4 GHz, the minimum distance required for far field measurement is closest to

C-V characteristics of silicon MOS capacitor having an area of 10^-4 cm² is shown. The permittivity’s of silicon and SiO₂ are respectively 10^-12 F/cm and 3 .5 x 10^-13F/cm, then maximum depletion layer width in silicon is