Physics
(i) Explain the meaning of the statement 'current rating of a fuse is 5A'.
(ii) In the transmission of power, the voltage of power generated at the generating stations is stepped up from 11 kV to 132 kV before it is transmitted. Why?
Related Questions
(i) Name the colour code of the wire which is connected to the metallic body of an appliance.
(ii) Draw the diagram of a dual control switch when the appliance is switched 'ON'.
(i) Which particles are responsible for current in conductors?
(ii) To which wire of a cable in a power circuit should the metal case of a geyser be connected?
(iii) To which wire should the fuse be connected?
Answer the following questions based on a hot cathode ray tube.
(i) Name the charged particles.
(ii) State the approximate voltage used to heat the filament.
(iii) What will happen to the beam when it passes through the electric field?
State three factors on which the rate of emission of electrons from a metal surface depends.