60. An LCR series circuit with R = 200 is connected to a 300 V, 50 Hz a.c. source. When only the capacitance is removed, the voltage leads the current by 60. When only the inductance is removed, the current leads the voltage by 60. The current in the circuit is - (1) 1.5 A (3) 2.25 A (2) 3 A (4) 2 (5) Question not attempted 61. A step-up transformer works on 220 volts and gives 2 A current to external resistor. The turn ratio between the primary secondary coils is 2: 25. Assuming 100% efficiency, what is the power delivered by it? (1) 3500 W (3) 5500 W (2) 4500 W (4) '6500 W (5) Question not attempted and 62. Transformer efficiency is given by - output power (1) 1- input power input power (2) 1- output power losses (3) 1- wo input power input power (4) 1- losses (5) Question not attempted 63. The root mean square value (Vrms) of the saw-tooth waveform shown in figure below, is (in volts) v 16 (1) (3) 0 0 1 2 3 4 5 6 t 12033 16 128 (2) 3 16 256 (4) 3 3 (5) Question not attempte2024 15:02 43