Which of the following is used in a fire alarm?

Define magnetic field. Describe an activity to draw magnetic field lines around a bar magnet from one pole to another pole.

To convert an $AC$ generator into a $DC$ generator,

When is the force experienced by a current-carrying conductor placed in a magnetic field the largest?

$(a)$ Electric fuse is an important component of all domestic circuits. Why?
$(b)$ An electric oven of rating $2 \, kW, 220 \, V$ is operated in a domestic circuit with a current rating of $5 \, A$. What result would you expect? Explain.

What is a fuse? How does it function?