Corona discharges

What is a corona discharge?

• a. A type of lightning

• b. A phenomenon caused by excessive heat

• c. A visible glowing discharge caused by ionization in air

• d. A type of electrical short circuit

Which of the following can cause corona discharges?

• a. Low voltages

• b. Smooth surfaces

• c. Low electric field gradients

• d. High voltages

Where are corona discharges commonly observed?

• a. Power plants

• b. Vacuum chambers

• c. Everyday household appliances

• d. Water treatment plants

What are the potential risks associated with corona discharges?

• a. Increased power efficiency

• b. Reduced electromagnetic interference

• c. Damage to electrical components

• d. Enhanced equipment performance

How can corona discharges be detected?

• a. Through temperature measurements

• b. By observing a visible glowing discharge

• c. Using acoustic detection methods

• d. All of the above

What role do corona rings play in electrical equipment?

• a. They minimize the risk of corona discharges

• b. They enhance the intensity of corona discharges

• c. They prevent electrical insulation

• d. They amplify electrical fields

Can corona discharges produce ozone?

• a. Yes, through the ionization of oxygen molecules

• b. No, ozone is not a byproduct of corona discharges

• c. Only in the presence of high humidity

• d. Only when corona discharges occur in a vacuum

How can corona discharges be prevented?

• a. By increasing the electric field gradients

• b. By using sharp edges or points

• c. By maintaining proper insulation

• d. By reducing the voltage below a certain threshold

What is the effect of corona discharges on power transmission?

• a. Reduced power losses

• b. Increased line impedance

• c. Improved voltage stability

• d. Decreased radio frequency interference

In which of the following applications are corona discharges intentionally utilized?

• a. Air purifiers

• b. X-ray machines

• c. Nuclear power plants

• d. Wind turbines