GATE Measurements: Time frequency and instruments – Previous Year Questions

5 GATE previous year questions on Time frequency and instruments (Measurements, Instrumentation Engineering) with answers and explanations, from every paper.

GATE 2021 IN Q42 (2 marks, Multiple choice) – A 10½-digit counter-timer in frequency mode with gate time T s=1 s reads 1000 for a certain input. Without disconnecting it, switch to period mode in…
GATE 2024 IN Q60 (2 marks, Numerical answer) – The switch SW shown changes from position 1 to 0 when V C changes from logic HIGH to LOW, and vice versa. The PMMC voltmeter bandwidth is 1 Hz. For V…
GATE 2025 IN Q26 (1 mark, Multiple choice) – An oscilloscope has an input resistance of 1 MΩ. A 10X passive attenuating probe is connected to it to increase the input voltage range as well as the…
GATE 2026 IN Q48 (2 marks, Multiple choice) – A closed Lissajous pattern observed on an oscilloscope in X–Y mode has three horizontal tangencies and two vertical tangencies in steady state. If the…
GATE 2026 IN Q62 (2 marks, Numerical answer) – A digital counter increments its count every 0.1\ s. The counter is used in an instrument to measure frequency. It is operated for one period of the…