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Questions and Answers
Which core material has the highest permeability, low exciting current, low errors, and saturation at a relatively low flux density?
Which core material has the highest permeability, low exciting current, low errors, and saturation at a relatively low flux density?
- Copper
- Aluminum
- Cold-rolled grain-oriented silicon steel
- Nickel-iron(77% Ni, 14% Fe (correct)
Which core material has a high permeability, high saturation level, reasonably small exciting current, and low errors?
Which core material has a high permeability, high saturation level, reasonably small exciting current, and low errors?
- Aluminum
- Copper
- Nickel-iron(77% Ni, 14% Fe
- Cold-rolled grain-oriented silicon steel (correct)
Up to what current rating does the core material made from nickel-iron alloy have reasonably good accuracy?
Up to what current rating does the core material made from nickel-iron alloy have reasonably good accuracy?
- 30 times the rated current
- 10-15 times the rated current (correct)
- 5 times the rated current
- 20 times the rated current
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