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In the circuit figure, a voltmeter reads 30V when it is connected across 400W resistance. The same voltmeter will read (XY/2) V when it

 

In the circuit figure, a voltmeter reads 30V when it is connected across 400W resistance. The same voltmeter will read (XY/2) V when it is connected across the 300W resistance. Find the magnitude of (X-Y) if both X&Y are integers less than 10. V 30V 3000 4000

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