What indicates the overcurrent of a fuse or breaker?

• A.The maximum inrush current an overcurrent protection device can handle within a defined period of time
• B.The maximum electrical current which can flow in a particular electrical system under short-circuit conditions; it is determined by the voltage and impedance of the supply system
• C.The current at which the device will trip
• D.The current that a fuse or breaker is able to interrupt without being destroyed or causing an electrically damaging arc

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What is the calculation for the desired attenuation factor for shielding material?

• A.A = 20 log (M / R)
  Where A is Attenuation M is the maximum acceptable value R is the real value measured
• B.A = M / R
  Where A is Attenuation M is the maximum acceptable value R is the real value measured
• C.A = 20 log (R / M)
  Where A is Attenuation R is the real value measured M is the maximum acceptable value
• D.You do not have to calculate the attenuation factor for shielding material as it always has the same attenuation

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