Energy, power and resistance

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Question 28

Medium

A heating element is constructed by joining two cylindrical wire segments of equal length, $X\,$ and $Y$ , end-to-end in series as shown below.

Heating Element Wire segments

Segment $X\,$ has a resistivity of 1.5 × 10^-6 Ω m and a diameter of 0.50 mm. Segment $Y\,$ has a resistivity of 4.5 × 10^-7 Ω m and a diameter of 1.50 mm.

What is the ratio $Y\displaystyle \frac{\text{Resistance of segment } X}{\text{Resistance of segment } Y}$ ?

$0.37$

$10$

$30$

$90$

Energy, power and resistance

Question 28

Energy, power and resistance Questions

Energy, power and resistance

Question 28

Energy, power and resistance Questions