Rheostat Functionality and Specifications

The video tutorial by JW introduces a large rheostat or variable resistor, highlighting its specifications, including its 2-amp rating and 113-ohm resistance. The internal structure is explored, showing the resistance wire wound on a ceramic former and the sliding contact mechanism. The video demonstrates measuring resistance with a meter, ensuring accuracy. It also covers the contact points made of brass and safety considerations when handling high voltages. Maintenance tips, such as applying contact lubricant, are provided, and the video concludes with an invitation to subscribe for future content.

What is the rated current capacity of the Zenith rheostat?

• 1 amp

• 2 amps

• 5 amps

• 10 amps

What is the resistance value of the Zenith rheostat?

• 113 ohms

• 100 ohms

• 150 ohms

• 200 ohms

What material is the cylindrical former of the rheostat likely made of?

• White ceramic

• Glass

• Metal

• Plastic

How many contact points does the rheostat have?

• Eight

• Six

• Four

• Two

What is the primary material used for the contact points in the rheostat?

• Copper

• Aluminum

• Brass

• Steel

Why is it not advisable to use high voltages with this rheostat?

• It can overheat

• It can cause electric shock

• It can cause a short circuit

• It can damage the device

What pattern is the resistance wire wound in?

• Random

• Linear

• Spiral

• Zigzag

What maintenance step is suggested for the rheostat?

• Tighten screws

• Apply contact lubricant

• Clean with water

• Replace the wire

What is the maximum current rating of the Zenith rheostat?

• 2 amps

• 3 amps

• 1 amp

• 4 amps

What is the purpose of the vents on the rheostat?

• To increase resistance

• To improve aesthetics

• To reduce weight

• To allow airflow