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Question

Capacitor C subscript 3 end subscript in the circuit is a variable capacitor (its capacitance can be varied). Graph is plotted between potential difference V subscript 1 end subscript (across capacitor C subscript 1 end subscript) versus C subscript 3 end subscript Electric potential V subscript 1 end subscript approaches on asymtote of 10 V as C subscript 3 end subscript rightwards arrow infinity

The electric potential V across the battery is equal to:

  1. 10 V    
  2. 12 V    
  3. 16 V    
  4. 20 V    

The correct answer is: 10 V

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