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The current density varies radical dista...

The current density varies radical distance r as `J=ar^(2)`, in a cylindrical wire of radius R. The current passing through the wire between radical distance `R//3 and R//2` is,

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ALLEN -CURRENT ELECTRICITY-EXERCISE-V A
  1. Two metallic s pheres of radii R(1) and R(2) are connected b y a thin ...

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  2. When the power delivered by a 100 volt battery is 40 watts the equival...

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  3. Two batteries, one of emf 18V and internal resistance 2Omega and the o...

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  4. When a wire of uniform cross-section a, length l and resistance R is ...

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  5. For the network shown in the figure the value of the current i is

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  6. In a potentiometer experiment it is found that no current passes throu...

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  7. A potentiometer wire has resistance 40Omega and its length is 10m. It ...

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  8. A 2^(@)C rise in temperature is observed in a conductor passing a curr...

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  9. If a uniform wire of resistance R is uniformly strethced to n times th...

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  10. In the circuit shown if a conducting wire is connected between points ...

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  11. The emfs and resistance in the circuit (as shown in the figure) have t...

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  12. Electric field inside a copper wire of length 10 meter, resistance 2 o...

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  13. The resistance of an ammeter is 13 Omega and its scale is graduated fo...

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  14. The current density varies radical distance r as J=ar^(2), in a cylind...

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  15. Four wires of the same diameter are connected, in turn, between two po...

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  16. Five resistance, each of 5Omega are connected as shown in figure. Find...

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  17. In the circuit shown, the current through the 4 Omega resistors is 1 a...

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  18. A galvanometer of resistance 50Omega is connected to a b attery of 3V ...

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  19. A current of 3 A flows through the 2 Omega resistor as shown in the ci...

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  20. In the circuit shown in figure potential difference between the points...

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