28) Which of the following substances is allowed in RoHS compliant equipment?

29) What is the output offset voltage of an amplifier which gives an output of 4.8 V for an input of 0.5 V? Gain of the amplifier is 10.

30) In an Operational amplifier integrator, the current through the input resistor flows into the

31) If the input frequency of a bridge rectifier is 100Hz, its output frequency will be

32) An ideal voltage step up transformer with 4:1 turns ratio is connected to a 120V input supply. What will be the current through 100 ohm load resistor at the secondary?