Question

The simultaneous applications of signals x (t) and y (t) to the horizontal and vertical plates respectively, of an oscilloscope, produce a vertical figure of 8 displays. If P and Q are constants and x(t) = P sin (4t + 30), then y(t) is equal to _________

a.

Q sin (4t -30)

b.

Q sin (2t +15)

c.

Q sin (8t +60)

d.

Q sin (4t +30)

Answer: (b).Q sin (2t +15)

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Q. The simultaneous applications of signals x (t) and y (t) to the horizontal and vertical plates respectively, of an oscilloscope, produce a vertical figure of 8 displays. If P and Q...

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