Question
Explain Hertz experiment for communication of electromagnetic waves. Draw labelled diagram of apparatus used in the experiment.
$(or)$
Explain Hertz experiment related with electromagnetic waves and also explain experiments of Jagdish Chandra Basu and Marconi.
$(or)$
Critically evaluate Hertz experiment of production and communication of electromagnetic waves.

Answer

SELF

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A group of students while coming from the school noticed a box marked "Danger H.T. 2200 V" at a substation in the main street. They did not understand the utility of such a high voltage, while they argued, the supply was only 220 V.They asked their teacher this question the next day. The teacher thought it to be an important question and therefore explained to the whole class.
Answer the following questions:
  1. What device is used to bring the high voltage down to low voltage of a.c. Current and what is the principle of its working?
  2. Is it possible to use this device for bringing down the high d.c. Voltage to the low voltage? Explain.
  3. Write the values displayed by the students and the teacher.
A closed coil having 100 turns is rotated in a uniform magnetic field B = 4.0 × 10-4T about a diameter which is perpendicular to the field. The angular velocity of rotation is 300 revolutions per minute. The area of the coil is 25cm2 and its resistance is $4.0\Omega.$ Find
  1. The average emf developed in half a turn from a position where the coil is perpendicular to the magnetic field.
  2. The average emf in a full turn.
  3. The net charge displaced in part (a).
Match the following
Image
A 600pF capacitor is charged by a 200V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?
State and explain Biot-Savart law. Use it to derive an expression for the magnetic field produced at a point near a long current carrying wire.

  1. Estimate the speed with which electrons emitted from a heated emitter of an evacuated tube impinge on the collector maintained at a potential difference of 500 V with respect to the emitter. Ignore the small initial speeds of the electrons. The specific charge of the electron, i.e., its e/m is given to be 1.76 × 1011 C kg–1.
  2. Use the same formula you employ in (a) to obtain electron speed for an collector potential of 10 MV. Do you see what is wrong? In what way is the formula to be modified?
A piano wire A vibrates at a fundamental frequency of 600Hz. A second identical wire B produces 6 beats per second with it when the tension in A is slightly increased. Find the ratio of the tension in A to the tension in B.
When a metal plate is exposed to a monochromatic beam of light of wavelength 400nm, a negative potential of 1.1V is needed to stop the photocurrent. Find the threshold wavelength for the metal.
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1mm. Conductor B is a hollow tube of outer diameter 2mm and inner diameter 1mm. Find the ratio of resistance RA to RB.
An object is placed at a distance of 30cm from a converging lens of focal length 15cm. A normal eye (near point 25cm, far point infinity) is placed close to the lens on the other side.
  1.  Can the eye see the object clearly?
  2.  What should be the minimum separation between the lens and the eye so that the eye can clearly see the object?
  3.  Can a diverging lens, placed in contact with the converging lens, help in seeing the object clearly when the eye is close to the lens?