EMC Question of the Week: A current filament in free space carries a sinusoidal current, Ic. Which equation for the magnitude of the maximum radiated electric field strength is correct (or at least plausible)? Answer at learnemc.com/emc-question-o….

EMC Question of the Week: One advantage of a 50-μH LISN compared to a 5-μH LISN is that the 50-μH LISN can make measurements a.) at higher frequencies b.) at lower frequencies C.) on AC powerlines d.) on DC powerlines. Answer at learnemc.com/emc-question-o….

EMC Question of the Week: By design, the twisted wire pairs in a CAT6 cable all have slightly different a.) characteristic impedances b.) wire diameters c.) twist rates d.) imbalance factors Answer at learnemc.com/emc-question-o….

EMC Question of the Week: Which radiated emissions specification is the most stringent at 100 MHz? a) FCC Part 15 Class B b) CISPR 32 Class B c) MIL-STD-461 RE102 d) CISPR 25 (automotive) Class 5 Answer at learnemc.com/emc-question-o….

EMC Question of the Week: Is one of these two RLCG models for a two-conductor transmission line better? And, if so, why? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week - One way to reduce the thermal noise floor of an EMI test receiver measurement by 20 dB is to reduce the a) room temperature b) reference level c) resolution bandwidth d) frequency span? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: In products that meet all of their EMC requirements, the circuit boards are typically a) isolated from chassis ground b) shielded c) circular d) green Answer at learnemc.com/emc-question-o….

EMC Question of the Week: Which of these two-port networks is fully characterized by its S-parameters? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: Which acronym below was commonly used to describe electromagnetic interference decades ago? a.) RMS b.) ELF c.) EMB d.) RFI Answer at learnemc.com/emc-question-o…

EMC Question of the Week: Where should the cable shield be connected when the chassis at one end is not connected to system ground? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: The main EMC-related advantage of twisting a pair of parallel wires is that it reduces the: a) far-field radiation b) near-field coupling c) inductance per unit length d) all of the above Answer at learnemc.com/emc-question-o…

EMC Question of the Week: The voltage standing wave ratio (VSWR) in a transmission line is a function of the line's characteristic impedance and the a) source impedance b) termination impedance c) both (a) and (b) d) neither (a) nor (b) Answer at learnemc.com/emc-question-o….

EMC Question of the Week: Conduction current in copper is characterized by the a) flow of electrons b) electric field perpendicular to the surface c) time-rate-of-change of the electric field d) cross product of electric and magnetic fields Answer at learnemc.com/emc-question-o….

EMC Question of the Week: If a multi-layer printed circuit board has a solid ground plane on Layer 2, then a ground fill on Layer 1 is usually not recommended. Why? Answer at learnemc.com/emc-question-o….

EMC Question of the Week: The yellow component in the image below is a a) ceramic capacitor b) tantalum capacitor c) TVS diode d) crystal oscillator Answer at learnemc.com/emc-question-o….

EMC Question of the Week: The primary purpose of printed circuit board shields is to reduce a) conducted coupling b) radiated coupling c) near-field coupling d) power bus noise Answer at learnemc.com/emc-question-o….

EMC Question of the Week: Which of these RC low-pass filter layouts is most likely to help this product meet its EMC requirements? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: A microstrip trace pair has a differential-mode impedance of 100 Ω and a common-mode impedance of 40 Ω. What termination resistances match both the common-mode and differential-mode propagation. Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: A stripline trace in an FR-4 dielectric forms a transmission line with a capacitance per unit length equal to 1.5 pF/cm. What is the characteristic impedance of that transmission line? Full question and answer at learnemc.com/emc-question-o….

EMC Question of the Week: The main purpose of a shielded cable's drain wire is to provide: a) mechanical strength b) a path for low-frequency current c) an earth ground connection d) a connection to the connector shield. Answer at learnemc.com/emc-question-o….