Related InterviewSolutions

• People rely on magnets for industrial and commercial use. Since scientists began creating very strong magnets using electricity, magnets have become essential to the medical and electronic sectors. People even rely heavily on magnets in their homes. Briefly discuss three uses of magnets in different fields.
• State two serious hazards of electricity.
• What the two main precautions to be taken while using an electric supply?
• Write the help of a labelled circuit diagram, describe an activity to illustrate the patterns of the magnetic field lines around a straight current carrying long conducting wire. (i) Name the rule that is used to find the direction of magnetic field associated with a current carrying conductor. (ii) Is there a similar magnetic field produced around a thin beam of moving: (a) alpha particles (b) neutrons? Justify your answer.
• What is the role of fuse, used in series with any electrical appliance? Why should a fuse with defined rating not be replaced by one with a larger rating?
• What is the capacity of an electric fuse used in (i) lighting circuit (ii) power circuit in house hold supply?
• Where do we connect a fuse: with live or with neutral wire?
• We use electromagnetic induction in many ways in our daily lives, in most cases without realizing it. One recent invention is a flashlight that works without a battery. Further, in air travel safety, electromagnetic induction is used to prevent dangerous metallic objects (such as knives and guns) from being carried on the planes. (i) When was electromagnetic induction discovered? To which human quality do you attribute this discovery? Visualize the scenario prior to this discovery. (ii) How does a batteryless flashlight work? (iii) How are passengers screened at the airport?
• What important observation did Oersted make in his experiment with current-carrying conductors?
• Why is magnetic field maximum at the centre of a current-carrying coil?