⚡Electrical Engineering Q&A⚡

🔍

🖊️Ask a Question

⚡Electrical Engineering Q&A⚡

What causes sparking at the brushes?

by EE Q&A asked Apr 13 73 views

What causes sparking at the brushes?

Please log in or register to answer this question.

1 Answer

by EE Q&A answered Apr 13

It is due to the self-induction of the coil undergoing commutation.

Next Question ⇨⇦ Previous Question

Related questions

by EE Q&A asked May 28 3 views

What inductance will give the same reactance as a capacitor of 2 μF when both are at 50 Hz? a. 5H b. 10H c. 15H d. 20H

What inductance will give the same reactance as a capacitor of 2 μF when both are at 50 Hz? a. 5H b. 10H c. 15H d. 20H
Last Answer : Ans. a. 5H ...

△ 0 like ▽ 0 dislike

1 answer

by EE Q&A asked Apr 13 9 views

Should the brushes of a loaded generator be placed in the neutral plane?

Should the brushes of a loaded generator be placed in the neutral plane?
Last Answer : No, because the brushes must be advanced by a certain angle (called brush lead) beyond the neutral plane to prevent sparking...

△ 0 like ▽ 0 dislike

1 answer

by EE Q&A asked May 30 1 view

According to IS 4648:1968, ceiling fans should be hung at least ______ feet above the floor. a. 6 b. 7 c. 8 d. 9

According to IS 4648:1968, ceiling fans should be hung at least ______ feet above the floor. a. 6 b. 7 c. 8 d. 9
Last Answer : Answer : d. 9 feet Ceiling and Floor: 9 ft or 2.75 m Ceiling Fan Blades and Ceiling: 8 to 10 inches Ceiling Fan Blades and Light fixtures: 39 inches Ceiling Fan Blades and Wall: 18 inches...

△ 0 like ▽ 0 dislike

1 answer

by EE Q&A asked Apr 24 15 views

An electrical iron carrying 2A at 120V. Find resistance of the device?

An electrical iron carrying 2A at 120V. Find resistance of the device?
Last Answer : Soln : = 120/2 = 60W...

△ 0 like ▽ 0 dislike

1 answer

by EE Q&A asked Apr 13 48 views

What is the permissible rise of temperature in a well-designed generator?

What is the permissible rise of temperature in a well-designed generator?
Last Answer : 27 degree C above the surrounding air...

△ 0 like ▽ 0 dislike

1 answer

Aerospace-Engineering Animals Aptitude Architect Astronomer Baker Biology Businessman Chef Chemical-Engineering Civil-Engineering Dentist Doctor Electrical-Engineering Electrician Engineer Environment Explain-Like-Im-Five Factory-Worker Farmer Firefighter Florist Gardener Gardening-Plants-Agriculture Hairdresser Health High-School JEE Kindergarten Lecturer Librarian Life-Pro-Tips Mechanic Mechanical-Engineering Middle-School NEET Nursery-School Pharmacist Pilot Primary-School Receptionist Scientist Tailor MCQs Ask Public

...