1
GATE EE 2011
MCQ (Single Correct Answer)
+1
-0.3
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 frequency equal to
A
the highest frequency that the multiplexer can operate properly
B
twice the frequency of the time base (sweep) oscillator
C
the frequency of the time base (sweep) oscillator
D
half the frequency of the time base (sweep) oscillator
2
GATE EE 2009
MCQ (Single Correct Answer)
+1
-0.3
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 ellipse to circle and back to ellipse with its major axis changing orientation slowly and repeatedly. The following inference can be made from this.
A
The signals are not sinusoidal.
B
The amplitudes of the signals are very close but not equal
C
The signals are sinusoidal with their frequencies very close but not equal
D
There is a constant but small phase difference between the signals
3
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
The probes of a non $$-$$ isolated, two-channel oscilloscope are clipped to points $$A, B, $$ and $$C$$ in the circuit of the adjacent fig. $${V_{in}}$$ is a square wave of a suitable low frequency. The display on $$c{h_1}$$ and $$c{h_2}$$ are as shown on the right. Then the ''signal'' and ''Ground'' probes $${S_1},\,\,{G_1}$$ and $${S_2},\,\,{G_2}$$ of $$c{h_1}$$ and $$c{h_2}$$ respectively are connected to points. GATE EE 2007 Electrical and Electronics Measurement - Cathode Ray Oscilloscope Question 3 English
A
$$A, B, C, A$$
B
$$A, B, C, B$$
C
$$C, B, A, B$$
D
$$B, A, B, C$$
4
GATE EE 2006
MCQ (Single Correct Answer)
+1
-0.3
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 the scope and observes the screen to be as shown in the upper trace of the fig. An unknown signal is connected to channel -2 (lower trace ) of the scope. If the time/div and V/div on both channels are the same, the amplitude (p-p) and period of the unknown signal are respectively. GATE EE 2006 Electrical and Electronics Measurement - Cathode Ray Oscilloscope Question 4 English
A
5V, 1ms
B
5V, 2ms
C
7.5V, 2ms
D
10V, 1ms
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