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Three 2Omega resistors, A, B and C, are ...

Three `2Omega` resistors, A, B and C, are connected as shown in figure. Each of them dissipates energy and can withstand a maximum power of 18 W without melting. Find the maximum current that can flow through the three resistors?

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Given power P = 18 W.
Since current through resistors connected in series is same, current through resistor A and combination of B and C will be the same.
Using `P=I^(2)RrArrI=sqrt(P/R)`
Maximum current through resistor `A=sqrt18/sqrt2=3A`. This current divides itself equally while flowing through B and C since B and C have equal values. Thus, the maximum current through resistors B and C each, `3xx0.5=1.5A`.
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ZEN PUBLICATION-ELECTRICITY-ZEN ADDITIONAL QUESTIONS SECTION (SHORT ANSWER TYPE 2 QUESTIONS)
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  2. Draw a circuit diagram of an electric circuit containing a cell, a key...

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  3. A current of 1 ampere flows in a series circuit containing an electric...

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  4. Draw a schematic circuit diagram consisting a battery, a plug key, an ...

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  5. Why is an ammeter always connected in series in a circuit? What change...

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  6. Two V-I graphs are drawn individually for two resistors and their comb...

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  9. If Three resistors of 6Omega,9Omegaand21Omega are connected in series ...

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  10. Two resistances when connected in parallel give resultant value of 2Om...

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  11. i] Define electric potential difference. How is ammeter connected in a...

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  12. i] State Ohm's law ii] Explain the factors on which the resistance o...

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  13. Three 2Omega resistors, A, B and C, are connected as shown in figure. ...

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  14. Draw a circuit diagram of an electric circuit containing a cell, a key...

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  15. A current of 1 ampere flows in a series circuit containing an electric...

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  16. Draw a schematic circuit diagram consisting a battery, a plug key, an ...

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  17. Why is an ammeter always connected in series in a circuit? What change...

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  18. Two V-I graphs are drawn individually for two resistors and their comb...

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  19. Show four different ways in which three resistors of Rohm each may be ...

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  20. Two wires of equal length, one of copper and the other of manganin [an...

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