According to the text, a thick asphalt structural failure which requires its total removal is
In an experiment, two point charges Q1 and Q2 were put on a straight line path, at a certain distance from each other. When both Q1 and Q2 are charged with +2,0 [mC] each, the resulting electric field intensity equals zero in the middle point in the line path between Q1 and Q2. This is true since their electric field vectors in this position have the same magnitude but opposite directions.
Com relação a esse texto, assinale a alternativa correta.A transformer has a primary winding circuit with 200 turns and a secondary winding circuit with 10 turns. In an ideal, lossless, transformer model, the magnetic core permeability is infinite despite the voltages applied to the windings, the two windings are perfectly coupled and there are no internal resistance in the condutors. In such transformer, when a sinusoidal voltage is applied at the secondary winding with an amplitude of 5,0 [V] RMS, the RMS voltage in the primary winding terminals is equal to 100,0 [V].
Com relação a esse texto, assinale a alternative correta.A 4 poles pairs synchronous machine operates as a motor inside an industrial electrical network, with nominal frequency of 50,0 [Hz]. The synchronous machine rotor is equipped with short-circuited bars, creating a squirrel-cage auxiliary winding, dedicated for dumping effects during transients and also to allow the startup of the motor, when the machine is directly connected to the mains power source.
É apresentada no texto uma máquina elétricaA logic circuit has three boolean inputs and one output named A, B, C and S respectively. The boolean input A is connected to an inverter gate, and its result is submitted to an AND gate, along with the input signal B. The AND gate output is then submitted to an OR gate along with the remaining boolean input C. The output of the OR gate is the resulting signal S.
De acordo com o texto, o circuito lógico possui
Assinale a alternativa que apresenta um tipo de aplicação para supercomputadores NÃO mencionada no texto.
De acordo com o texto, o computador reconhecido, de uma forma geral, como sendo o primeiro supercomputador de fato foi o
A seguinte afirmação apresenta considerações acerca do projeto de máquinas elétricas.
“There are numerous inherent shortcomings to the concept of magnetic circuits, except for the fact that it is the easiest design tool available for calculating fluxes in practical machinery design. Although the use of Maxwell’s equations produces exact results, this method demands considerable effort and does not present significant benefits, when compared to the results produced by the magnetic circuits’ method.” Assinale a alternativa que melhor descreve a afirmação.A afirmação descreve um equipamento elétrico empregado em sistemas elétricos de potência.
“The winding resistances of an ideal transformer are negligible, all the flux is confined to the core and the permeability of the core is infinite.” De acordo com a afirmação, um transformador ideal possui enrolamentos com resistênciaA afirmação descreve um arranjo experimental composto por um amplificador operacional utilizado como subtrator.
“An ideal operational amplifier acting differentially as a subtractor, has an unitary gain. In this case, the output signal is given by the difference from the voltage signal connected to the negative terminal of the op-amp to the voltage signal connected to the positive one. When the voltage signal connected to the negative terminal is fifty volts (positive) and the voltage signal connected to the positive terminal is one hundred and fifty volts (negative), the output signal is two hundred volts (positive).” O texto descreve um arranjo experimental composto por um amplificador operacional na configuração