GATE IN 2022 Paper 1 — page 20

Questions 58–60 of 65. Imported answers require review unless explicitly marked reviewed.

In the circuit shown,

and

. If the base-to-emitter voltage of the npn BJT is 0.7 V and the collector-to-emitter voltage is 5.2 V, the

(current gain) of the BJT is ______ (round off to two decimal places)

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A capacitor is constructed using two concentric spheres and air as the dielectric medium (permittivity of air = 8.854 × 10

F/m). The radii of the inner and outer spheres are

cm and

cm, respectively. The capacitance (in picofarads) is ______ (round off to 2 decimal places)

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A 1 kHz sine-wave generator having an internal resistance of 50

generates an open-circuit voltage of 10 V

. When a capacitor is connected across the output terminals, the voltage drops to 8 V

. The capacitance of the capacitor (in microfarads) is ______ (round off to two decimal places)

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2022 · Paper 1