1.

12 V battery is connected in a circuit and to this 4W, 12W, resistors are connected in circuit from this information and the current in the circuit.

Answer»

Solution :
The RESULTANT RESISTANCE of 4W. 12W connected in parallel is
`(1)/(R)=(1)/(R_(1))+(1)/(R_(2))`
`(1)/(R)=(1)/(4)+(1)/(12)rArr(1)/(R)=(3+1)/(12)`
`therefore(1)/(R)=(4)/(12)rArrR=(12)/(4)`
`thereforeR=3Omega`
The total resistance in the CIRCUIT is
`R=R_(1)+R_(2)=3+3=6`
`thereforeR=6Omega`
The current in the circuit
`I=(V)/(R)rArrI(12)/(6).`
`thereforeI=2A`


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