Question
In half-wave rectifier, what is the output frequency if
the input frequency is 40 Hz. What is the output frequency of a full-wave rectifier for the same input frequency?Solution
Input frequency = 50Hz For a half-wave rectifier, input frequency is equal to the input frequency. Output frequency = 40Hz For a full-wave rectifier, the output frequency is twice the input frequency. Therefore, Output frequency = 2 × 40 = 80 Hz
230 192 172 ? 122 100
...What value should come in the place of (?) in the following number series?
64, 80, 104, ?, 176, 224
97, 106, ?, 195, 411, 460
What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
Find the missing term:
2, 6, 15, 31, 56, ?
32   48   96   ?   720   2520
82, 98, 130, 178, 242, ?
4 10 ? 62.5 156.25 390.625
...140, 146, 170, 224, ?, 470
7 47 ? 223 359 527
...