Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 4Ω in series with a combination of two resistors

+3 votes
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asked Jan 4, 2018 in Physics by Rohit Singh (61,782 points) 35 133 356

Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 4Ω in series with a combination of two resistors (8Ω each) in parallel and a voltmeter across parallel combination. Each of them dissipates maximum energy and can withstand a maximum power of 16W without melting. Find the maximum current that can flow through the three resistors.

1 Answer

+3 votes
answered Jan 4, 2018 by Rohit Singh (61,782 points) 35 133 356
 
Best answer

We know that P= i2×R×T

given P=16W

i =  \sqrt{16 \div 8  }  \\ i =  \sqrt{2 } \\ i = 1.414
So, taking t= 1 sec

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