P1.2 - Electricity Knowledge Test

Candidate Name:
1) How would you draw a series circuit with the following components; a bulb, voltmeter, battery and variable resistor?
2) What provides the potential difference for an electrical charge to flow through a closed circuit?
3) What is the definition of electric current?
4) What is the size of an electrical current determined by?
5) How could you draw a circuit diagram to include the following components; bulb, cell, ammeter and an LDR?
6) How are flow of charge, current and time linked by an equation?
7) In a single closed loop what would the value of current be?
8) How are current, potential difference and resistance linked by an equation?
9) What does the current through a component depend on?
10) What is the difference in function between a resistor and a variable resistor?
11) What are the factors affecting resistance in a wire?
12) How would a high resistance of a component affect the current and potential difference across the component?
13) How could you use a graph to identify if a circuit was linear or non-linear and relate the curves to their function and properties?
14) What happens to the resistance of a filament lamp as the temperature increases?
15) A diode will have a very high resistance in which direction?
16) How does the current through an ohmic conductor (at a constant temperature) behave in relation to the current?
17) How could you draw a circuit to measure the resistance of a component by measuring the current through, and potential difference across, the component? (include the equation)
18) How does the resistance of a diode behave in relation to the current of the component?
19) How does the current through a diode behave?
20) How are thermistors used for? Give an example.
21) What happens to the resistance of an LDR as light intensity increases?
22) How are LDRs used in circuits? Oive an example.
23) What happens to the resistance of a thermistor as the temperature increases?
24) Why would the resistance of a semiconductor decrease?
25) How do the Big Ideas link to this topic?

a) Forces:

b) Particles:

c) Energy:

d) Cells: