Current electricity questions | form six Physics

(5945) Question Category: Short answers

Define the following terms:
(i) Current density
(ii) Conductivity.

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(5946) Question Category: Short answers

Under what condition is Ohm’s law true?

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(5947) Question Category: Short answers

Why does the voltage across the terminals of a cell or battery fall when it is delivering a
current?

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UNSOLVED

(5948) Question Category: Short answers

Define temperature coefficient of resistance.

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UNSOLVED

(5949) Question Category: Mathematical Calculation

A heating coil of Nichrome wire with cross sectional area of 0.1​mm2 operate on a 12V
supply, and has a power of 36​W when immersed in water at 373K. Calculate the length of
the wire.

Answer / Solution

UNSOLVED


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