45) Equation of voltage from source is v=3sin(20t)+4sin(30t). What is the power dissipated if this voltage is applied across a 10 Ohm resistor.

46) Which of the following is a loss in a d.c. generator

47) In an intrinsic semiconductor

48) In a transistor based oscillator, the total loop gain required to sustain oscillation is

49) Two electric bulbs with rating 100W, 220 V are connected in series to a 220V supply. Let the power dissipated be W1. Then the same bulbs are connected in parallel to the same supply. Let the power dissipated be W2. W1/W2 is