By increasing the number of turns $3$ times in a toroidal solenoid,the magnetic field:

Which of the following statements is false?

Explain what is short-circuiting and overloading in an electric supply.

An alternating electric current has a frequency of $50 \ Hz$. How many times does it change its direction in one second (in $\times$)?

$(a)$ Describe an activity to determine the direction of magnetic field produced by a current-carrying straight conductor. Also,show that the direction of the magnetic field is reversed on reversing the direction of current.
$(b)$ An $\alpha$-particle (which is a positively charged particle) enters a uniform magnetic field at right angles to it as shown below. Stating the relevant principle,explain in which direction will this $\alpha$-particle move?

In which of the following cases will maximum electric current be induced in the loop?