**Current In a circuit adding cells (Physics (11-14) eBook)**

How does the current vary with the number of cells added to the battery?

**Can lamp brightness be used to measure current? (Physics (11-14) eBook)**

This activity involves pupils thinking in detail about the relationship between brightness and current. It makes use of a Current and Light Level sensor to test a qualitative method of measuring current.

**Current In a circuit (Physics (11-14) eBook)**

This is one of a series of investigations into current in a circuit.

**Parallel circuits and current (Physics (11-14) eBook)**

This is one of a series of investigations into current in a circuit. How is current shared around a parallel type circuit

**Current and voltage in a series circuit (Physics (11-14) eBook)**

This one of a series of investigations into current in a circuit. This part requires additional lamps and or cells to be added and the changes measured.

**Electrical Equivilence Of Heat (Physics (14-18) : Electricity & Heat eBook)**

The experiment is very simple and compares the power generated in heating a resistance coil to the heat energy transferred to the water. Measurements are made in Joules to emphasise the transfer of energy.

**Current and brightness In a circuit (Physics (14-18) : Electricity & Heat eBook)**

This activity involves pupils thinking in detail about the relationship between brightness and current. Good opportunity to remind about the difference between voltage and current.

**Extension leads (Physics (14-18) : Electricity & Heat eBook)**

Why do they always tell you to fully unwind an extension lead? a simple investigation to model power loss over long cable runs.

**Electromagnets strength and current. (Physics (14-18) : Electricity & Heat eBook)**

Investigate the magnetic field strength of a simple electromagnet as the current varies.

**Good and bad conductors (Physics (14-18) : Electricity & Heat eBook)**

This activity is a standard practical comparing current flow with different materials in a circuit. Strips of different conductors and insulators are provided for the pupils. Conductors are anything that let a current flow. -

**Connecting resistors (Physics (14-18) : Electricity & Heat eBook)**

Shows the current in circuit with different resistor values and combinations. Leads to resistor calculations.

**Current and voltage (Physics (14-18) : Electricity & Heat eBook)**

Introductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are measured against time.

**Current and voltage (Physics (14-18) : Electricity & Heat eBook)**

Introductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are plotted directly against each other, leading into characteristics of conductors / components.

**Series circuits (No choice for current flow) (Physics (14-18) : Electricity & Heat eBook)**

This should be a revision exercise to show that in a series circuit current only flows when complete circuit is present.

**Parallel circuits (current has choice of paths) (Physics (14-18) : Electricity & Heat eBook)**

This should be a revision exercise to show that in a parallel circuit current flows along all routes and that the sum of the current sin each route is equal to the total current.Introduction to Kirchoff's current law.

**Simple series circuits (lamp resistors) (Physics (14-18) : Electricity & Heat eBook)**

The effect of a component offering electrical resistance in circuit is revised.

**Ohms Law (Physics (14-18) : Electricity & Heat eBook)**

A study of Ohm's law for resistors. Collects data graphically against time to allow the students to change plot to voltage vs current.

**Ohms law current vs voltage plot (34a) (Physics (14-18) : Electricity & Heat eBook)**

Activity set up to let the software plot voltage vs current directly. Opens the possibility of more investigation of the relationship between voltage and current and the type of resistance. Resistance can also be calculated and plotted.

**Electrical characteristics (LED, resistor and filament lamp) (Physics (14-18) : Electricity & Heat eBook)**

Create voltage current curves for LED, resistor and filament lamp. This worksheet assumes all three curves in one teaching session. 35a and 35b restrict to fewer devices per session. -

**Electrical characteristics (resistor and filament lamp) (Physics (14-18) : Electricity & Heat eBook)**

Specific worksheet to produce voltage current curves for a resistor and filament lamp (ohmic and non ohmic resistance)

**Capacitors: charge stored. (Physics (14-18) : Electricity & Heat eBook)**

Collect voltage and current data during a capacitor charge and discharge cycle. Use built in tools to find the energy transferred and stored.

**Start up current of a lamp (Physics (14-18) : Electricity & Heat eBook)**

High speed data logging, making the invisible visible! See how the current, voltage, resistance and power all change at the instant a lamp turns on. Starts to explain why lights only fail at turn on!

**Efficiency of an electric motor / generator (Physics (14-18) : Electricity & Heat eBook)**

The efficiency of a motor / generator is determined. This worksheets has details of the motor and generator calculations and method

**Efficiency of an electric generator (Physics (14-18) : Electricity & Heat eBook)**

Determines the efficiency of a generator. Uses a falling mass as the energy source and records voltage and current to produce power curves.

**Efficiency of an electric motor (Physics (14-18) : Electricity & Heat eBook)**

uses a known mass lifted through a known distance compared to the power required by a motor to lift the mass.

**Electromagnets strength vs number of Turns (Physics (14-18) : Electricity & Heat eBook)**

How does the number of turns in the coil affect the strength of the electromagnet?

**Electromagnets : What happens if you use an alternating current in an electromagnet coil? (Physics (14-18) : Electricity & Heat eBook)**

Passing an alternating current through an electromagnet will produce a powerful non permanent magnet. Why would this be an advantage? why is magnetic permanence reduced?

**How does the magnetic field strength vary with current? (Physics (14-18) : Electricity & Heat eBook)**

Uses an ac power supply to provide a constantly changing current Using the ac power supply gives multiple repeats of the same experiment .

**How does the magnetic field change along the axis of a coil? (Physics (14-18) : Electricity & Heat eBook)**

This investigation will allow the students to understand the way the field changes along the axis of a coil. It uses the EASYSENSE software’s Snapshot facility with a function that asks the user for a value (in this case the distance) after each data collection.

**Efficiency of a transformer (Physics (14-18) : Electricity & Heat eBook)**

Simple experiment to measure volts in and volts out. Data collected can be used to show phase match / difference and power in and power out.

**Dc characteristic of a diode (Physics (14-18) : Electricity & Heat eBook)**

A more detailed study of diodes than a simple voltage current curve. Students study 1. How does the current change as the voltage across the diode increases? 2. How does the V vs. I characteristic change if the voltage is reversed? 3. When the diode is conducting how does resistance vary.