The electro magnetic waves was invented by
Marconi
Marx Plank
Maxwell
Graham Bell
TV set receives waves through
Receiver
Local antenna
Picture tube
Speaker
The discovery of electrons lead to a new branch of physics called
Optics
thermal physics
nuclear physics
electronics
The atomic number of an atom is equal to its
number of nucleus
number of neutrons
number of electrons
atomic mass
A tape recorder can be used both for recording and reproduction of sound with the help of
magnetic property of the tape
electrical property of the tape
chemical property of the tape
metallic property of the tape
The wireless system was invented by
Edison
Newton
Cinematography works on the principle of
Electro magnetic indection
Persistence of vision
Chromatography
Photo electric effect
Which of the following waves ca be formed by rapidly changing electric and magnetic fields?
Oscillating waves
Sound waves
Electro magnetic waves
Short waves.
Magnetic recording and reproduction are made by
electro magnets
permanent magnets
copper rods
graphite roads
A radio set receives electro magnetic waves and converts them in to sound waves back with the help of
antenna
receiver
speaker
tuner
