3. a) Name the factors on which the heat produced in a wire depends upon. b)
Why does the fuse wire have low melting point? c) What is meant by magnetic
effect of electric current? How can the strength of a magnetic field be
increased? Really urgent
Answers
Answer:
3a) The heat produced in a wire depends on the current flowing in the wire and the resistance of the wire
b) A fuse wire should have high resistance and low melting point. So that it prevents current higher than the prescribed value to pass . Low melting point will let it to break when high current passes through it because of the heat generated.
c) Magnetic Effect of Electric Current – A magnetic field is a force field that is created by magnetic dipoles and moving electric charges, and it exerts a force on other nearby moving charges and magnetic dipoles.
d) You can add more coils on top of the first row, and this just adds more field strength. In technical terms, every coil of wire increases the "magnetic flux density" (strength) of your magnet. The magnetic field on the outside of the coil resembles a bar magnet.