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Question 18M.2.HL.TZ2.4c

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.HL.TZ2.4c
Level HL Paper 2 Time zone TZ2
Command term Comment Question number c Adapted from N/A
c.
[Maximum mark: 2]
18M.2.HL.TZ2.4c

The diagram shows a potential divider circuit used to measure the emf E of a cell X. Both cells have negligible internal resistance.

M18/4/PHYSI/SP2/ENG/TZ2/04

(c)

Cell X is replaced by a second cell of identical emf E but with internal resistance 2.0 Ω. Comment on the length of AC for which the current in the second cell is zero.

[2]

Markscheme

since the current in the cell is still zero there is no potential drop across the internal resistance

and so the length would be the same

 

OWTTE

[2 marks]

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