Q63 of 84 Page 290

A lightning conductor is a device which transfers:

Lightening conductor is a device which is used to protect a tall building from lightening. A metallic rod, taller than the building, is installed in the walls of the building during its construction.

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61

The device used for detecting charge (positive or negative) on an object is called:

 62

A charged object attracts an uncharged object by producing opposite charges in the nearer end of the uncharged object by the process of:

 64

When a plastic comb is rubbed with dry hair, the hair get positively charged by friction. In this porcess:

 65

Which of the following part of the earth is made up of molten iron?