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Three bulbs,each having a resistance of ...

Three bulbs,each having a resistance of `180(Omega)`are connected in parallel to an ideal battery of emf60V. Find the current delivered by the battery when (a)all the bulbs are switched on,(b)two of the bulbs are switched on and (c )only one bulb is switched on.

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(a)` R_eff = 180/3 = 60 Omega `
` i= 60/60= 1A `
` (b) R_eff = 180/2 = 90 Omega `
`i=60/90 = 0.67 A `
` (c) R_eff = 180 Omega. `
` i=60/180 = 0.33A `.
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HC VERMA-ELECTRIC CURRENT IN CONDUCTORS-Exercises
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  3. Three bulbs,each having a resistance of 180(Omega)are connected in par...

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  4. Suppose you have three resistor of (20 Omega),(50 Omega)and (100 Omega...

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  5. A bulb is made using two filaments.A switch selects whether the filame...

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  6. 100A exists in the 5k(Omega) resistor, find the currents in the other ...

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  7. An ideal battery sends a current of 5A in a resistor. When another res...

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  8. Find the equivalent resistances of the network shown in figurebetween ...

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  9. A wire of resistance 15.0(Omega)is bent to form a regular hexagon ABCD...

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  10. Consider the circuit shown in figure.Find the current through the10(Om...

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  11. Find the currents through the three resistors shown in Figure

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  12. Shown a part of an electric circuit, The potentials at the points a,b,...

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  13. Each of the resistors shown in figure has a resistances of 10(Omega)an...

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  14. Find the potential difference V(a)-V(b)in the circutis shown in figure

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  15. In the circuit shown in figure ,(epsilon)(1)=3V,(epsilon)(2)=2V,(epsil...

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  16. Find the current through the 10(Omega)resistor shown in figure.

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  17. Find the current in the resistor shown in figure.

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  18. What should be the value of R in figure of which the current in it is ...

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  19. Find the equivalent resistance of the circuit shown in figure between ...

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  20. Find the current measured by the ammeter in the circuit shown in figur...

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