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Question 17N.2.HL.TZ0.2d

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Date November 2017 Marks available [Maximum mark: 3] Reference code 17N.2.HL.TZ0.2d
Level HL Paper 2 Time zone TZ0
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 3]
17N.2.HL.TZ0.2d

There is a proposal to power a space satellite X as it orbits the Earth. In this model, X is connected by an electronically-conducting cable to another smaller satellite Y.

(d)

Satellite X must release ions into the space between the satellites. Explain why the current in the cable will become zero unless there is a method for transferring charge from X to Y.

[3]

Markscheme

electrons would build up at satellite Y/positive charge at X

preventing further charge flow

by electrostatic repulsion

unless a complete circuit exists

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