1.
State what is meant by Ohm's law. [1]
JD SCIENCE
Electricity
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by resistivity. [1]
3.
State what is meant by terminal pd. [1]
4.
State what is meant by potential divider. [1]
5.
State what is meant by superconductivity. [1]
6.
State what is meant by power in circuits. [1]
7.
State what is meant by Kirchhoff 1. [1]
8.
State what is meant by Kirchhoff 2. [1]
9.
State what is meant by an emf. [1]
10.
State what is meant by a semiconductor. [1]
11.
Amira is asked about Ohm's law in a AQA Physics paper.
(a) Describe Ohm's law. [2]
(b) Explain why Ohm's law is important in this topic. [3]
12.
Amira is asked about resistivity in a AQA Physics paper.
(a) Describe resistivity. [2]
(b) Explain why resistivity is important in this topic. [3]
13.
Amira is asked about terminal pd in a AQA Physics paper.
(a) Describe terminal pd. [2]
(b) Explain why terminal pd is important in this topic. [3]
14.
Amira is asked about potential divider in a AQA Physics paper.
(a) Describe potential divider. [2]
(b) Explain why potential divider is important in this topic. [3]
15.
Amira is asked about superconductivity in a AQA Physics paper.
(a) Describe superconductivity. [2]
(b) Explain why superconductivity is important in this topic. [3]
16.
Amira is asked about power in circuits in a AQA Physics paper.
(a) Describe power in circuits. [2]
(b) Explain why power in circuits is important in this topic. [3]
17.
I=V/R. 12 V, 4.0 Ω [3]
18.
ρ=RA/L. R=2.0, A=0.50×10⁻⁶, L=2.0 [3]
19.
ε=I(R+r). I=0.50, R=10, r=2.0 [3]
20.
Vout of 12 V across 1 kΩ and 3 kΩ (across 3 kΩ) [3]
21.
Power in a 6.0 Ω resistor at 2.0 A [3]
22.
Lost volts if I=0.40 A, r=1.5 Ω [3]
23.
Amira carries out a AQA-style required practical linked to electricity. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Amira carries out collecting valid data for electricity. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Amira carries out drawing a graph for electricity. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Amira carries out evaluating a method about electricity. This is a typical AQA required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare Ohm's law with resistivity. [4]
28.
Compare resistivity with terminal pd. [4]
29.
Compare terminal pd with potential divider. [4]
30.
Compare potential divider with superconductivity. [4]
31.
Apply your knowledge of Kirchhoff 1 to this situation: currents into a junction = currents out [3]
32.
Apply your knowledge of Kirchhoff 2 to this situation: sum of emfs = sum of pds around a loop [3]