11. The figure shows a network of resistors, all having the same resistance R. F

Question

11. The figure shows a network of resistors, all having the same resistance R. Find the equivalent resistance, measured between points a and b A) 5R/2 B) R/4 C) 10R/2 D) R E) None of the other choices 12. The drait below contains three identical light bulbs connected as shown to an EMF , which single light bulb(s) is the brightest? A) A B) B C) C D) B and C E) All three are equally bright 13. The density of free conduction electrons in copper is approximately ne 8.5 x 10 !m. The r = 1.7 x 10 .m. The drift velocity for a copper wire is 103m s when it is connected to an external battery. What must be the magnitude of the electric field maintained within the wire? A) 1.36 x 10 V/m B) 0.231 V/m C) 0.462 V/m D) 0.347 V/m E) 0.116 V/m

Explanation / Answer

11.

The net resistance is 5R/2

Therefore the correct option is A

As per guidelines only first question can be answered.

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