IB Physics HL B.5.5 Electrical power Question Bank

Practise IB Physics HL B.5.5 by analysing rms and peak power, transformer transmission and I²R losses in electrical networks.

Exam points

Convert rms and peak current or voltage to average power in resistors and alternating-current circuits.
Explain transformer step-up transmission by linking high voltage, lower current and reduced I²R cable loss.

[Maximum number: 1]

This question is in two parts

The plates in (c) are replaced by a cell that has an emf of 12.0 V and internal resistance $5.00 \Omega$ . A resistor of resistance R is connected in series with the cell. The energy transferred by the cell to an electron as it moves through the resistor is $1.44 \times 10^{-18} \mathrm{~J}$ .

Calculate the total power supplied by the cell.

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B.5.5—Electrical power question 1