Electrical RECF Exam Practice Questions and Answers

Electrical RECF Exam Practice Questions and Answers In a series circuit voltage is - Answer️️ -additive In a series circuit current is - Answer️️ -constant In a series circuit resistance is - Answer️️ -additive In a parallel circuit voltage is - Answer️️ -constant In a parallel circuit current is - Answer️️ -additive In a parallel circuit resistance is - Answer️️ -1/1/R+Rn A.M. means - Answer️️ -amplitude modulation F.M. means - Answer️️ -frequency modulation Amplitude measures - Answer️️ -how high something is Frequency measures - Answer️️ -how much something happens in a given period of time An electromagnetic motor has electricity flowing through thousands of wire coops called ______ - Answer️️ -Windings EMF means - Answer️️ -Electro Magnetic lines of Flux What is the job of thousands of wire coops? - Answer️️ -Pick up EMF which touches other loops and creates electricity Why does electricity have polarity? - Answer️️ -They emit EMF Electricity moves through wires in a similar motion to what - Answer️️ -magnets. (opposites attract) How is motion produced by - Answer️️ -Changing polarity what is the shortcut when finding the total resistance in a parallel circuit when all the resistors are the SAME value. - Answer️️ -Value of 1 resistor / Number of resistors. A 20 ohm resistor, a 10 ohm resistor, and a 20 ohm resistor are all connected in parallel. What is the total resistance? - Answer️️ -5 ohms A 20 ohm resistor, a 10 ohm resistor, and a 20 ohm resistor are all connected in parallel. In series with the second 20 ohm resistor is a 15 ohm resistor. Now, what is the total resistance? - Answer️️ -20 ohms memory device called ROM (read only memory) can be programmed only once, if you are keeping a lifetime database about a specific person. What type of information would make sense to store in ROM? - Answer️️ -Date of Birth 2 Computer memory types - Answer️️ -RAM and ROM What is RAM - Answer️️ -Random Access Memory What is ROM - Answer️️ -Read Only Memory Difference between RAM and ROM - Answer️️ -RAM is dynamic(constantly changin