Electric Circuits The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance? 200 Ohms. 50 Ohms. 100 Ohms. 25 Ohms. 200 Ohms. 50 Ohms. 100 Ohms. 25 Ohms. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are 40 Ω and 200 Ω. 40 Ω and 40 Ω. 50 Ω and 200 Ω. 25 Ω and 5 Ω. 40 Ω and 200 Ω. 40 Ω and 40 Ω. 50 Ω and 200 Ω. 25 Ω and 5 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits The greater the internal resistance of a cell the greater the terminal voltage. the lesser the terminal voltage. the greater the emf. the lesser the emf. the greater the terminal voltage. the lesser the terminal voltage. the greater the emf. the lesser the emf. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits In question no.3, which of the following is true ? iL(0) = ic (0). ic (0+) = i(0+). i(0+)= iL(0+). None of these. iL(0) = ic (0). ic (0+) = i(0+). i(0+)= iL(0+). None of these. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of heater will increase. decrease. none of these. remain constant. increase. decrease. none of these. remain constant. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A parallel plate capacitor contain there dielectric layers of 1, 2 and 3 respectively and thickness of dielectric layers are 0.2 mm, 0.3 mm and 0.4 mm respectively. If area of plate is 20 cm2. What is the value of capacitance? 30 pF. 32 pF. None of them. 36.6 pF. 30 pF. 32 pF. None of them. 36.6 pF. ANSWER DOWNLOAD EXAMIANS APP
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