4. A letter A is constructed of a uniform wire of
resistance 1 ohm per cm. The sides of the letter are
20 cm and the cross piece in the middle is 10 cm long.
The resistance between the ends of the legs will be
(a) 32.4 ohm
(b) 28.7 ohm
(c) 26.7 ohm
(d) 24.7 ohm
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The sides of the letter are 20 cm and the cross - piece in the middle is 10 cm long. The apex angle is 60^∘ . The resistance between the ends of the legs is.
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The circuits are shown above.Using trignometry, 5x = sin30 = 0.5 x = 10 cm Thus we get AB = CD = 20 - 10 = 10 cm Since all parts are of same length, ...
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