Question

why a television that was temporarily connected to an electric circuit without a fuse got damaged

Answer 1

Fuses are used to protect the circuit when the current is overloaded or damaged.

It is always connected in series, so that when the circuit is overloaded, it breaks the connection with the load.

So it can be prevented from the damage.

If the fuse is connected in parallel, it will not affect the circuit in any way.

Thus, if the television is connected in series to the electric circuit with the fuse, then the television will be protected from overload.