1. What would happen if we replaced the wire in a fuse with
thick copper wire?
2. What is an electromagnet? How can we increase the strength
of this magnet?
3. Distinguish between a cell and a battery:
4. Name one disadvantage of solar cells.
5. What is a circuit diagram?
6. Draw a circuit diagram made up of
a. 2 lamps b. A 3- cell battery c. A switch
Answers
Answer:
1ans-the melting point would be low
2ans-electromqgnet is a temporary magnet made from passage of electric current it can be increased by passing more current
3ans-cell is used for remote ,watch and etc
battery is used for cars , generator and etc
4ans-its very expensive
5ans-diagram in which circuit is drawn in correct arrangements
Explanation:
1. Fuse is designed to be withstand and allow to flow of maximum rating current and even overloading current (depend on maximum current carrying capacity of service conductor ) , so sometimes when load demands more and current drawn by load is exceeded its limit by some values the protective device must be allow it and if it is continiously increses it must be use to break the circuit .
2. You can make an electromagnet stronger by doing these things:
wrapping the coil around a piece of iron (such as an iron nail)
adding more turns to the coil.
increasing the current flowing through the coil.
3. A cell is known as a single unit device that converts electrical energy to chemical energy, while a battery is a group of different cells. A cell can be either of wet, dry, fuel or reserve type depending on the kind of electrolytes used, while a battery is either rechargeable or non-rechargeable.
4. One drawback of solar energy is that it relies on the sun, electricity cannot be generated during the night, requiring you to either store excess energy made during the day, or connect to an alternate power source such as the local utility grid.
5. A circuit diagram is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.
6. (a) The circuit diagram for the two lamps connected across a cell in series is shown in the figure.
(b) The brightness of the lamps can be changed by connecting the lamps in parallel.
