Electric Circuits When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by ω ε/σ. ω σ/ε. σ/ω ε. σ ω ε. ω ε/σ. ω σ/ε. σ/ω ε. σ ω ε. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+? short circuit. dielectric losses increases. open circuit. dielectric losses decreases. short circuit. dielectric losses increases. open circuit. dielectric losses decreases. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits What is the relation between line voltage and phase voltage in case of delta connection? None of these. VL = 1/ √3 VP. VL = VP. VL = √3 VP. None of these. VL = 1/ √3 VP. VL = VP. VL = √3 VP. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits Which of the following characteristics is/are attributed to an ideal independent voltage source? both ‘b’ and ‘d’. Independent of the magnitude of voltage supplied. Independent of the direction of flow of current. Independent of magnitude of current supplied.. both ‘b’ and ‘d’. Independent of the magnitude of voltage supplied. Independent of the direction of flow of current. Independent of magnitude of current supplied.. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits The efficiency in case of maximum power transfer theorem is 50 %. less than 50 %. 50 % - 100 %. 100 %. 50 %. less than 50 %. 50 % - 100 %. 100 %. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A 100 μF capacitor supplied from 3 V source with a frequency of 50 Hz. The capacitive reactance is 31.84 Ω. 15.92 Ω. 7.96 Ω. 63.68 Ω. 31.84 Ω. 15.92 Ω. 7.96 Ω. 63.68 Ω. ANSWER DOWNLOAD EXAMIANS APP
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