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2.1 Current, potential difference and resistance

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Question 10

A student builds a single closed loop containing a battery, a switch and a heater. Three identical ammeters, X, Y and Z, are connected in the loop:

  • X is between the battery and the heater
  • Y is just after the heater
  • Z is between the switch and the battery, after Y in the loop.

The ammeter readings are shown in the table.

AmmeterCurrent in A
X1.50
Y1.48
Z1.51

The student claims that the heater uses up some of the current, so the current at Y is smaller than the current at X.

a.

Evaluate the student's claim. Use data from the table in your answer.

[2]
b.

Use the reading on ammeter X to calculate the charge that flows past X in 2.0 minutes.

[2]
Markscheme

2.1 Current, potential difference and resistance Questions

  1. GCSE
  2. /Physics
  3. /2.1 Current, potential difference and resistance

82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.

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