Explanation of rheostat

1. G H RAISONI
UNIVERSITY
UNDER THE GUIDANCE OF – DR. VIJAY
DESHMUKH
NAME – PRAFUL RAHATE
ROLL NO – 21
TOPIC - RHEOSTATELECTRICAL AND ELECTRONICS
ENGINEERING

2. RHEOSTAT
• definition
• Principle
• working
• application

3. DEFINITION
•Rheostat is an electrical component that has an
adjustable resistance.

4. PRINCIPLE OF RHEOSTAT
• The basic principle that rheostats use is Ohm’s law, which
states that current is inversely proportional to resistance for
a given voltage. This means the current decreases as the
resistance increases or it increases as the resistance
decreases.

5. WORKING
• Current enters the rheostat through one of its
terminals, flows through the wire coil and contact,
and exits through the other terminal. Rheostats do
not have polarity and operate the same when the
terminals are reversed.

6. APPLICATION
• Rheostat is generally used in the applications
where high voltage or current is required., e.g.
Microwave oven, refrigerator, etc.
• Rheostats are used in dim lights to change the
intensity of light.
• Rheostats are used to increase or decrease the
volume of a radio and to increase or decrease
the speed of an electric motor.

7. EXTRA - DIY - STIMULATION
• Link - http://www.walter-
•To use the applet , similar as explained in
working.

8. REFERENCES
• http://www.walter-fendt.de/html5/phen/potentiometer_en.htm
• http://www.tech-faq.com/rheostat.html
• http://www.thephysicsteacher.ie/lcphysics23resistance.html
• http://www.pstcc.edu/departments/natural_behavioral_sciences/Web
%20Physics/Experim%2002web.htm

9. THANK YOU
HAVE A NICE DAY
Presented and edited by: Praful
Rahate