Electrical Energy

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Across
  1. 1. The unit for potential difference
  2. 3. 'Voltage' is a slang term for this
  3. 6. In an experiment, this variable is kept the same
Down
  1. 1. The equipment used to measure potential difference
  2. 2. A portable source of electrical energy
  3. 4. This is the variable which is 'the thing you measure'
  4. 5. A metal used for making electrical wires