Question

what is 41000 is this question..???

Draw a diagram of an electric circuit containing a cell.
a key, an ammeter, a resistor of 282 in series with
a combination of two resistors (412 each) in parallel
and a voltmeter across 41000the parallel combination.
Will the potential difference across the 2 resistor be
the same as that across the parallel combination of
412 resistors? Give reason.
​

Answer 1

PHYSICS

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

December 26, 2019avatar

Musaf Savvycrabby

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ANSWER

Here the circuit in which a resistor of resistance 4Ω is attached in series and two resistors of resistance 8Ω are attached in parallel. Also, Ammeter and voltmeter attached in the circuit in series and parallel respectively.

Now,

Maximum power of each resistor is 16W

4Ω resistor is joined in series with circuit .

so, Power=i

2

R , here i is current through resistor of resistance R

$$16=i^{2}\ast 4Ω$$

i = 2A

Now, 2A is passing through parallel resistors of resistance 8Ω.

we know, in parallel potential difference be constant so,

current divides two part , due to same resistance current on each resistance will be half . so, current passing through each parallel resistor is

2A

2

=1A

So, finally current through 4Ω resistor =2A

current through each 8Ω resistor =1A

Answer 2

Answer:

Thus, resistance of parallel combination is equal to resistance of resistors in series. So, potential difference across 20 resistance will be same as potential difference across the

other two resistors which are connected in parallel.