Measurement and Instrumentation
A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be

 625 Hz.
 250 Hz.
 500 Hz.
 400 Hz.

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Measurement and Instrumentation
If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

 The bridge is balanced for some specified value of R1, R2, R3.
 The bridge can not be balanced.
 The bridge can be balanced.
 The bridge is balanced for some specified value of frequency.

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