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The music system draws a current of 400 ...

The music system draws a current of 400 mA when connected to a 12 V battery.
The music system if left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing ?

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ICSE-CURRENT ELECTRICITY-EXERCISE-8(B) (NUMERICALS )
  1. A cell of e.m.f. 1.8 V and internal resistance 2 Omega is connected i...

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  2. The music system draws a current of 400 mA when connected to a 12 V ba...

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  3. The music system draws a current of 400 mA when connected to a 12 V ba...

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  4. A cell of e.m.f. ε and internal resistance r sends a current of 1.0 A ...

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  5. Two resistors having resistance 4 Omega and 6 Omega are connected in...

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  6. Four resistors each of resistance 2 Omega are connected in parallel. ...

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  7. You have three resistors of values 2 Omega , 3 Omega and 5 Omega . H...

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  8. Three resistors each of 2 Omega are connected together so that their ...

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  9. Calculate the equivalent resistance between the points A and B in Fig....

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  10. A combination consists of three resistors in series. Four similar sets...

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  11. In the circuit shown below in Fig., calculate the value of x if the eq...

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  12. Calculate the effective resistance between the points A and B in the c...

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  13. A uniform wire with a resistance of 27 Omega is divided into three eq...

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  14. A circuit consists of a resistor of 1 ohm in series with a parallel ar...

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  15. Calculate the effective resistance between the points A and B in the n...

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  16. Calculate the equivalent resistance between the points A and B in Fig.

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  17. In the network shown in Fig., calculate the equivalent resistance betw...

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  18. In the network shown in Fig., calculate the equivalent resistance betw...

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  19. Five resistors, each of 3 Omega , are connected as shown in Fig . Calc...

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  20. Five resistors, each of 3 Omega , are connected as shown in Fig . Calc...

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