GATE EE
Electrical and Electronics Measurement
Cathode Ray Oscilloscope
Previous Years Questions

## Marks 1

A stationary closed Lissajous pattern on an oscilloscope has $$3$$ horizontal tangencies and $$2$$ vertical tangencies for a horizontal input with fre...
The slope and level detector circuit in a CRO has a delay of 100 ns. The start-stop sweep generator has a response time of 50 ns. In order to display ...
The two signals $$S1$$ and $$S2,$$ shown in figure, are applied to $$Y$$ and $$X$$ deflection plates of an oscilloscope. The waveform displayed ...
In an oscilloscope screen, linear sweep is applied at the
A dual trace oscilloscope is set to operate in the ALTernate. The control input of the multiplexer used in the y-circuit is fed with a signal having a...
The two inputs of a $$CRO$$ are fed with two stationary periodic signals. In the $$X$$-$$Y$$ mode, the screen shows a figure which changes from ellips...
The probes of a non $$-$$ isolated, two-channel oscilloscope are clipped to points $$A, B,$$ and $$C$$ in the circuit of the adjacent fig. $${V_{in}}... The time/div and voltage/div axes of an oscilloscope have been erased. A student connects a 1kHz, 5V p-p square wave calibration pulse to channel-1 of... Two in-phase, 50Hz sinusoidal waveform of unit amplitude are fed into channel-1. and channel-2 respectively of an oscilloscope, Assuming that the volt... A certain oscilloscope with 4 c.m by 4 c.m screen has its own sweep output fed to its input. If the x and y sensitivities are same, the oscilloscope w... A lissajous pattern, as shown in figure below, is observed on the screen of a$$CRO$$when voltages of frequencies$${f_x}$$and$${f_y}$$are applied... A$$CRO$$screen has ten divisions on the horizontal scale. If a voltage signal$$5sin\left( {314t + {{45}^ \circ }} \right)$$is examined wi... ## Marks 2 Two Sinusoidal signal$$p\left( {{\omega _1}t} \right) = A\,\sin \omega t,$$and$$q\left( {{\omega _2}t} \right)$$are applied to$$X$$and$$Y$$inp... The simultaneous application of signals$$x(t)$$and$$y(t)$$to the horizontal and vertical plates, respectively, of an oscilloscope, produces a vert... A$$CRO$$probe has an impedance of$$500k\Omega $$in parallel with a capacitance of$$10pF$$. The probe is used to measure the voltage between$$P$$... List$$-{\rm I}$$represents the figures obtained on a$$CRO$$screen when the voltage signals$$\,{V_X}\,\, = \,\,{V_{Xm}}\sin \,\,\omega t\,\,\$...
Fig. shows the electrostatic vertical deflection system of $$CRT$$. Given that $${V_A}$$ is the accelerating voltage, the deflection sensitivity (defl...

## Marks 3

In an oscilloscope the input to the horizontal plates is a $$100Hz$$ voltage signal. The lissajous patterns $$(A), (B)$$ and $$(C)$$ will be generated...
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