Match Column-I with Column-II and mark the correct option.
Column - I | Column - II | ||
(a) | Richter scale | (i) | Electric Charge |
(b) | Electroscope | (ii) | Amber |
(c) | Resin | (iii) | Earthquake |
(d) | Electric current | (iv) | Flow of charges |
The Richter magnitude scale (also Richter scale) assigns a magnitude number to quantify the size of an earthquake.
An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium, was invented by British physician William Gilbert around 1600.
Amber is fossilized tree resin, which has been appreciated for its colour and natural beauty since Neolithic times. Much valued from antiquity to the present as a gemstone, amber is made into a variety of decorative objects. Amber is used as an ingredient in perfumes, as a healing agent in folk medicine, and as jewellery.
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma).