# Voltage - Differential 1V

datalogging sensors

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### Monitor voltage over a fast short or long slow period of time in addition to spot measurements.

20-sec Induction magnet in a coil

53-sec capacitor - charge & discharge

Teaching applications:
• Induction of voltage and current in conductors
• Ohm’s law
• Study of LEDs and Diodes and transistors
• Current from small solar cells

• Induction of voltage in a coil
• Electrical characteristics of low current components
• Dynamo effect
• Time constant, charge discharge of a capacitor

### Contents/Details:

±1 V (Resolution 1 mV)
Maximum Voltage ±10 V, Impedance 1 Meg ohm

Voltage sensors measure the potential difference between the ends of an electrical component and are connected in parallel. They can be used to measure both DC and low-voltage AC circuits. They should never be used with high voltages or household AC. The 4 mm plugs attach to most standard school’s electronics kits and power supplies.

A Voltage Sensor can be used in conjunction with a Current Sensor. Batteries are the first choice as the source of energy. An alternative is to use a fully isolated mains power supply with a regulated DC output (smoothed and fully rectified).

Be aware that some power supplies are ½ wave rectified producing an average rather than true DC, this sensor will ‘pick up’ the fluctuations in voltage and current from this type of power supply.

Mixed halides - potentiometric titration (Chemistry (14-18) eBook)
Finding the solubility product of silver halides using half cells and change in half cell voltage as ions are precipitated out by titration.

Volts from wind (Physics (11-14) eBook)
Wind turbines have been part of the fabric of life for many thousands of years. It is only in the last, make test and experiment with model turbines. Monitor voltage and current against other variables e.g. wind speed, blade size, blade angle etc.

Induction of electricity In a coil (Physics (11-14) eBook)
This activity is a simple demonstration of Faraday's experiments into induction. In this case we are merely demonstrating that a voltage is created when a magnet moves into and out of a coil.

Induction in a coiled conductor (Physics (14-18) : Electricity & Heat eBook)
take a long enough conductor, coil it round and you can get a good induced current / voltage. Classic magnet through a coil activity, but with a subtle twist.

Magnet spinning in a coil (Physics (14-18) : Electricity & Heat eBook)
The experiment is modelling the action of a small permanent magnet alternator, such as a bicycle dynamo.

Finding the end (Science in Sport (11-18) eBook)
With events that have long time bases e.g. marathons, timing can become a problem. Keeping a laser beam across a running track for many hours would seriously disrupt other events taking place. the activity looks at the technology behind RFid tagging .

Volts from wind (Science At Work (11-16) eBook)
This is an open ended investigation with several objectives in mind, 1. Introducing the idea of wind power as an alternative energy source. 2. The idea of iterative design to get the most efficient turbine. 3. The social impact of wind turbines.

Why is electric ac (Science At Work (11-16) eBook)
This experiment tries to show why it is that the electricity supply is created as an alternating current (AC).

HK\$ 557.00

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