Requirements for current to flow

1. Requirements for current to flow: Practical 11'28"

2. Short circuits and broken circuits 6'38"

Components and diagrams

1. Analogy 2'37"

2. Components 2'20"

3. Telling series and parallel circuits apart 6'30"

4. Effect of breaking series / parallel circuits at various places 16'04"

Batteries and bulbs

1. Terms 6'12"

2. Cells and brightness 6'35

3. Cells in series 7'55"

4. Cells in parallel 8'43"

5. Comparison: cells in series & parallel 1'46"

Variables and their measurement

1. Measuring V and I in a circuit with a bulb: Practical 7'18"

2. Measuring R in a circuit with an LED: Practical 9'14"

3. Measuring V and I in a circuit with an LED: Practical 5'54"

Factors affecting resistance

1. Terms 10'29"

2. Length 15'53"

3. Thickness 12'35"

Measuring V,R and I

1. Measuring V and I in a circuit with a bulb: Practical 7'18"

2. Measuring R in a circuit with an LED: Practical 9'14"

3. Measuring V and I in a circuit with an LED: Practical 5'54"

EMF and Potential Difference

1. EMF and Terminal potential difference: Practical 7'32"

2. Potential and potential difference 5'56"

3. Cells in series 7'55"

4. Cells in parallel 8'43"

5. Comparison: cells in series & parallel 1'46"

Current

1. Current flow 5'26"

2. Current direction 2'37"

3. Current strength 2'11"

Resistance

1. Resistance 5'09"

2. Equivalent resistance and fractions of resistance 4'25"

Adding resistors in series

1. Terms 3'77"

2. Investigation 9'06"

3. Adding resistors in series 7'38"

Position and current strength

1. Position and current strength 6'37"

2. Current strength at various positions in a series circuits 5'30"

Resistance and current strength

1. Terms 4'56"

2. Basic investigation 12'06"

3. Extended investigation 9'34"

Potential difference and current strength

1. Basic investigation 11'46"

2. Extended investigation 13'18"

3. Voltage changes: Series circuit 9'59"

Potential difference across components in series circuits

1. Single circuit 13'15"

2. Circuits with same R ratios 14'53"

Worked examples

1. Ammeter in a series circuit 1'21"

2. Current and position in a series circuit 2'23"

3. Connecting a circuit correctly 1'30"

4. Current strength comparison 2'21"

5. Current strength comparison explanation 1'40"

6. Potential difference across components in a series circuit: Part 1 4'59"

7. Worked example: Potential difference across components in a series circuit: Part 2 3'38"