How to make a bulb dimmer with a rheostat? Connet a rheostat in series with a bulb and battery. Describe how do you can make the bulb dimmer. (Start with connect the wire to connecting terminal)

Expert Answers

An illustration of the letter 'A' in a speech bubbles

Starting with one terminal of the battery, connect a wire to it and to one end of the rheostat.  Connect another wire from the other end of the rheostat to one side of the bulb. Connect another wire from the other side of the bulb back to the battery.

By sliding or rotating the rheostat (depending on the model you have) the resistance to the current in the circuit is either increased or decreased.  The increase in resistance causes less current to flow, making the bulb dimmer.  Conversely, the reduction in resistance causes more current to flow, making the bulb brighter.

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial