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TPC Electricity And Magnetism TOP Exam
Typology: Exams
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POWER is measured in - ANSWERS-Watts The COMBINED resistance of two 100 ohms resistors connected in a parallel would equal - ANSWERS- 50 ohms Ohms law can be MATHEMATICALLY expressed in which equation - ANSWERS-E=I(R) JIC symbol (rectangular figure) represents - ANSWERS-Rheostat The 4th color band on a resistor is SILVER, the measured value of resistance is within________ of the marked value - ANSWERS-10% The CENTER section of a transistor is called the - ANSWERS-Base An optoisolator recites a LOW voltage signal on LED side of the device and triggers a ________ voltage on the out-put - ANSWERS-Higher If a GAP exists in an electric current, the circuit is said to be_______ - ANSWERS-Open a WATT is defined as a joule per ______ - ANSWERS-Second AMPERES is the standard unit of measurement for _________ - ANSWERS-Electric current In order to dissipate the HEAT of high current loads a resistor must be physically _________ - ANSWERS- Large
If the POTENTIAL DIFFERENCE across a resistor decreases to zero, the current ___________ - ANSWERS- Decreases to Zero a CATHODE has a _________ charge - ANSWERS-Negative When trying to solve a SERIES-PARALLEL problem you should first________ - ANSWERS-Divide the circuit into smaller parts One COMPLETE cycle alternate current is generated by a ____________ rotation of a two pole operation
The purpose of a ______ in an ammeter is to carry current AROUND the meter movement - ANSWERS- Shunt a THERMOcouple is an example of a device that uses ______ to generate electricity - ANSWERS-HEAT example of what law - ANSWERS-Ohm's HAS many free electrons - ANSWERS-Conductors DO NOT have many free electrons and serves as a protective barrier between a worker and conductor. - ANSWERS-Insulators To DECREASE the resistance of a conductor, we can increase the _____ of that conductor. - ANSWERS- Cross-Sectional Area What is the flow from NEGATIVE to POSITIVE called? - ANSWERS-Electron Flow Acts similar to resistors, OPPOSES changes in current. (+) or (-). - ANSWERS-Inductors In a SERIES circuit, the ________ is the SAME at all points in the circuit. - ANSWERS-Current In a PARALLEL circuit, the ______ is the SAME at all branches of the circuit. - ANSWERS-Voltage The NEC defines a qualified person as - ANSWERS-someone who is familiar with equipment operation and hazards symbol is (E) in ohms law equation - ANSWERS-Voltage symbol is (I) in ohms law equation - ANSWERS-Current
symbol is (R) in ohms law equation - ANSWERS-Resistance A subatomic particle that has a POSITIVE charge and that is found in the nucleus of an atom - ANSWERS- Proton Has NO electrical charge and is considered neutral - ANSWERS-Neutron One _________ is equal to one coulomb per second. - ANSWERS-Ampere the amount of CHARGE a capacitor can store compared to the potential difference between terminals - ANSWERS-Capacitance A ________ semiconductor has a (-) charge and is also called a DONOR because it donates electrons to other materials. - ANSWERS-N-type A ______ semiconductor has a (+) charge and is also called an ACCEPTOR because it "accepts" electrons from other materials. - ANSWERS-P-type The effect of the current on the human body depends on 3 factors: the intensity of current, the duration of the current, and the _______. - ANSWERS-pathway of the current Which kind of device is used in hazardous conditions, can only release low levels of electricity, and can not explode? - ANSWERS-Intrinsically Safe Wearing heavy cotton clothing is considered safe. What material is not considered safe when working around electricity? - ANSWERS-Polyester Factory Mutual (FM) and Underwriter's Laboratories (UL) are both recognized as certified __________. - ANSWERS-Testing Laboratories