Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 a straight line.
 sinisoidal.
 an ellipse.
  a circle.

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Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 both of above.
 only the magnitude of the quantity being measured.
 magnitude, phase and waveform of the quantity being measured.
 only phase of the quantity being measured.

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