How would you set up an instantaneous displacement current of 2.0 A within the space between the two parallel plates of \(3_{ \mu }F\) capacitance?

A parallel plate capacitor is made out of two rectangular metal plates of sides 30 cm \(\times \)15 cm and separated by a distance of 2.0 mm. The capacitor is charged in such a way that the charging current has a constant value of 100 mA. What must be the rate of change of potential of the charging source to ensure this and what will be the displacement current in the region between the capacitor plates?

Nitin and Rajeev were studying the effect of certain radiations on flower plants. Nitin exposed his plants to ultraviolet rays, found that his plants got damaged after few days.Rajeev exposed his plants to infrared rays, found that his plants had a beautiful bloom, after a few days.
Read the above passage and answer the following question:
(i) What is the difference between ultraviolet rays and infrared rays
(ii) Why were the plants exposed to ultraviolet rays damaged and the plants exposed infrared rays had a beautiful bloom?
(iii) What are the basic values you have learnt from this study

Draw a labelled diagram of Hertz's experiment. Explain how electromagnetic radiations are produced using this set-up.

Akil was playing cricket with his friends, when a ball hit friend Bharat on his leg. Bharat screamed with pain. Akhil rushed towards him and comforted him and asked him not to move his leg. He quickly took out his cell phone and called up Bharat's parents and briefed them about the incident. In 10 minutes Bharat was taken to the nearby hospital and was examined by the doctor who advised for an X-rays test which confirmed a hairline fracture.
(a) How are X-rays produced?
(b) Mention one another application of X-rays.
(c) Mention two qualities of Akhil which are reflected from above situation.

Chirag was at the restaurant chatting with his cousins. The restaurant was clean and free of files and insects to his relief. His cousin was curious to know about the UV lamp in the corner and asked Chirag about it. Chirag explained that inside the fluorescent lamp, the electrical energy is converted into UV radiation. The inside of the tubes is coated with a fluorescent powder which absorbs the UV and emits violet light in the visible region. These attract the insects which are electrocuted by high-voltage wires near the lamp, so that don't fall on the food and contaminate them.
(a) Name the main source of UV rays?
(b) Why are they considered harmful to us?
(c) What impressed you about chirag?

Gopal visits his friend Naresh. In his house Naresh was playing with his kid sister and in spite of the broad day light, Gopal notices the tube light burning and advises him to save electricity. He also claims that the heat inside the room increases which would lead to global warming.
(a) What are the values associated with the decision saving electricity?
(b) Which electromagnetic wave is responsible for increase in the average temperature of the earth? Give other application of the electromagnetic wave.

In a class discussion, when there was Rajat turn, Rajat selected to talk on jagadish Chandra Bose who was a great Indian scientist. he told that, Jagadish Chandra bose was a great physicist and famous biologist .who rightly be called as inventor of wireless telegraphy. Earlier than a year before when Marconi patent his invention on wireless, in 1895, Bose showed the functioning of telegraphy in front of the public. Bose was the first man who fabricated a device that generates radio wavelength. Being a scientist, Bose selflessly dedicated his findings for further development in science. So Rajat on this told that an inventor can make lakhs of rupees through its one or two inventions as Bose invented many such instruments for industrial use. He further said that Bose on his invention rejected the offered money as he thought that knowledge was not an body's personal property and allowed anyone an everyone to use such fruits of his work. With Raja talk on Bose, whole class including his teacher applauded.
(i) Give two properties of the e.m.w. produced by Bose.
(ii) What values of Bose impressed you from the above passage?

There is a parallel plate capacitor of capacitance \(2.0\mu F.\) The voltage between the plates of parallel plate capacitor is changing at the rate of 6.0 V s^-1 . What is the displacement current in the capacitor?

A laser beam has intensity 3.0 x 10¹⁴ M m^-2. Find the amplitudes of electric and magnetic fields in the beam.