Which of the following objects is not a conductor of electricity?

A circuit is set up as shown in the diagram above. When the key is closed, the ammeter reading will be

Which of the following statements is/ are correct?

I. Gravitational potential due to a mass at a point a distance r away is proportional to \(r^{2}\)

II. Gravitational field strength is a vector quantity

III. Gravitational intensity is proportional to the weight of a unit mass.

The diagrams above illustrate electrical connections to the element of an electric pressing iron.In which of the connections is the fuse correctly fixed?

A transformer connected to a 240\(V_{r.m.s}\) has 3000 turns in its primary coil and 500 turns in its secondary coil. Calculate the output voltage.