physics 2 0.0 / 5 ? Physicsresistance and V = I x RGCSEEdexcel Created by: laviniahann3Created on: 29-05-17 10:35 What does the ammeter do? It measures the current flowing through the component 1 of 10 Where should the ammeter be placed? It must be placed in series (connected in a line with the component) 2 of 10 What does the voltmeter do? It measures the voltage or potential difference across the component 3 of 10 Where should the voltmeter be placed? It must be placed in parallel around the component under test - not around the variable resistor or cell 4 of 10 What is a fixed resistor? When the current through a resistor (at constant temperature) is proportional to voltage 5 of 10 What is a filament lamp? As the temperature of the filament increases, the resistance increases 6 of 10 What is a diode? When current will only flow through a diode in one direction 7 of 10 What is the formula for potential difference (voltage)? potential difference = current x resistance 8 of 10 What is the formula for current? current = voltage ÷ resistance 9 of 10 what is the formula for resistance? resistance = voltage ÷ current 10 of 10
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