what happens when a EM wave is transmitted

How d o the radio-waves pass through walls ?

Which wave phenomenon is not common to both light and sound waves? (a) Diffraction (b) Polarization (c) Reflection (d) Refraction

The waves in which, the particles of the medium vibrate in a direction perpendicular to the direction of wave motion, are known as: (A) Transverse waves (B) longitudinal waves (C) propagated waves (D) None of these

Microwave ovens work on the principle of (1) Absorption of microwaves by water (2) Absorption of microwaves by the vessel used for cooking (3) Reflection of the microwaves by the food (4) None of the above

Due to which property of the light waves, the solar and lunar eclipse take place? (1) Interference (2) Diffraction (3) Polarization (4) Rectilinear propagation

Which wave phenomenon is not common to both light and sound waves? 1 Diffraction 2 Polarization 3 Reflection 4 Refractioin

What is the typical data rate for wavelength division multiplexing?

Foxconn,

draw waveform of capacitor or inductor in a d.c ckt(during transient) with zero resistance with it(in series or parallel)also neglect resistance of wire

L&T,

When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

Bhel, Sail, Sterling Telecom, TCS,

. Sound waves travel at 300 m/s. Sound produced at a point is heard by a person after 5 seconds while the same sound is heard by another person after 6 seconds. What could be the maximum and minimum distances between the two persons? (a) 1.8km, 0.15 km (b) 2.2km, 0.20 km (c) 2.8km, 0.25 km (d) 3.3km, 0.3 km

What is the wavelength of visible spectrum? 1 1300A-3000A 2 3900A-7600A 3 7800A-8000A 4 8500A-9800A

Is it possible to calculate a voltage for microwave energy generating in oven? Is there any formula relating frequency and voltage and it should be independent of speed?

Which wave phenomenon is not common to both light and sound waves?

what is the advantage of pwm pulse compare to squarewave pulse.