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Serjik [45]
4 years ago
8

You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you

want to achieve the smallest possible resistance, you should attach the leads to the opposite faces that measure.
A) 3 cm × 5 cm.

B) 3 cm × 8 cm.

C) 5 cm × 8 cm.

D) Any pair of faces produces the same resistance.
Physics
1 answer:
max2010maxim [7]4 years ago
8 0

Answer:

c. 5cm \times 8cm

Explanation:

The dimensions 5cm\times 8cm have the highest cross-sectional area combination of 40cm^2.

-Resistance reduces with an increase in cross sectional area.

-Reason-Electrons have alarger area to flow through.

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θ =28.07⁰

Explanation:

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\frac{F_{n}sin\theta}{F_{n}cos\theta} = \frac{\frac{mv^{2} }{r} }{mg}

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