Electric Circuits When water is added to sulphuric acid lot of heat is generated. acid particles get separated. colour of acid changes. water start boiling. lot of heat is generated. acid particles get separated. colour of acid changes. water start boiling. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest? 10 Hz. 100 Hz. 1 Hz. 1000 Hz. 10 Hz. 100 Hz. 1 Hz. 1000 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A star connected load has three equal impedance each of (40 + j30) Ω If the line current is 5 A then value of line voltage is 250 / √3 V. 250 V. 250 √3 V. 200 V. 250 / √3 V. 250 V. 250 √3 V. 200 V. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A external resistance R is connected to a cell of internal resistance r, then the current is maximum when None of these R < r. R > r. R = r. None of these R < r. R > r. R = r. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A voltage source having an open circuit voltage of 100 V and internal resistance of 50 Ω is equivalent to a current source 2 A with 50 Ω in series. 0.5 A in parallel with 50 Ω. none of these. 2 A with 50 Ω in parallel. 2 A with 50 Ω in series. 0.5 A in parallel with 50 Ω. none of these. 2 A with 50 Ω in parallel. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A rectangular magnet of magnetic moment M is cut into two pieces of same length. The magnetic moment of each piece will be M / 2. M / L. 2 M. M. M / 2. M / L. 2 M. M. ANSWER DOWNLOAD EXAMIANS APP
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