When crest of one wave falls over the trough of the other wave this phenomenon is known as________________?

Related Mcqs:

1. In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?

   A. Equal to D.C. value
   B. More than D.C. value
   C. Less than D.C. value
   D. Zero

2. The simplest type of rectification known as half wave rectification is obtained by____________________?

   A. using a transistor
   B. suppressing the harmonics in A.C voltage
   C. suppressing half wave of A.C supply by using diode
   D. using a Coolidge tube

3. Electron moves in the orbit as________________?

   A. Simple vibratory motion
   B. Standing wave motion
   C. Vibratory motion like up and down
   D. S.H.M likes the sound

4. A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10 ?

   A. 15 m
   B. 20 m
   C. 5 m
   D. 25 m

5. A simple pendulum suspended from the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is_________________?

   A. Infinite
   B. T/g
   C. Zero
   D. g/T

6. A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?

   A. always an node in formed
   B. always an antinode is formed
   C. neither node nor antinode is formed
   D. sometimes a node and sometimes an antinode is formed

7. An electromagnetic wave consists of _____________________?

   A. Electric and magnetic fields moving parallel to each other
   B. Magnetic field moving with velocity of light in space
   C. Electric field moving with velocity of light
   D. Electric and magnetic fields moving perpendicular to each other

8. When the amplitude of a wave becomes double its energy become_________________?

   A. Double
   B. Four times
   C. One half
   D. None time

9. Wave-like characteristic of electron is demonstrated by______________?

   A. Line spectrum of atoms
   B. Production of x-rays.
   C. Diffraction by crystalline solids
   D. Photoelectric effect

10. In half-wave rectification the output D.C. voltages is obtained across the load for_______________?

    A. The negative half cycle of A.C.
    B. The positive half cycle of A.C.
    C. The positive and negative half cycles
    D. Either positive or negative half of A.C.