A voltage of $6 c o s (100 π t) V$ is fed as y - input to a CRO. The waveform seen on the screen of the CRO is shown in the figure. The Y and X axes settings for the CRO are respectively.

1 V / d i v a n d 1 m s / d i v

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1 V / d i v a n d 2 m s / d i v

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2 V / d i v a n d 1 m s / d i v

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2 V / d i v a n d 2 m s / d i v

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Solution

The correct option is D $2 V / d i v a n d 2 m s / d i v$
Upon observing the waveform,
3 division on the Y axis is equal to the peak value of voltage i.e, 6V. Hence, the Y setting is 2 V/div.

An angular frequency of $100 π t$ would corresponds to frequency of 50 Hz.
$i . e ., T i m e p e r i o d = \frac{1}{50} = 20 m s e c$

$∴$ 10 correspond to a X setting of

$\frac{20}{10} = 2 m s e c / d i v$

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