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Q.

Two square metal plates A and B are of the same thickness and material. The side of B is twice that of A. These are connected as shown in series. If the resistances of A and B are denoted by RA and RB then (RA/RB) is :

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a

2/1

b

1/1

c

1/2

d

4/1

answer is C.

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Detailed Solution

As we know, Resistance=resistivityxlengtharea

Since the side of the square is doubled the area of the plate B will be double that of plate A.

Since the length and area are both double.

RA=RB

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