Tag: physics

According to Joule's heating effect of current, heat energy is generated across a conductor due to the current flowing through it and hence its temperature increases.

Whenever an electric current is passed through a conductor, it gets heated up. And the amount of heat created is directly proportional to the square of the current.

Whenever an electric current is passed through a conductor,it gets heated up. This indicates that a part of electrical energy gets converted into heat energy.

An electric bulb works on the principle of hearing effect of current. It consists of a tungsten filament with a coating of thorium.

he electricity used over the lifetime of a single incandescent bulb costs 5 to 10 times the original purchase price of the bulb itself. Light Emitting Diode (LED) and Compact Fluorescent Lights (CFL) bulbs have revolutionized energy-efficient lighting. CFLs are simply miniature versions of full-sized fluorescents.

$1.$ Bulb work by heating up a small wire called a filament. Electric current heats the filament so much that it glows.

ISI mark is a certification mark for industrial products in India. The mark certifies that a product confirms to the Indian Standard(IS), mentioned as CM/L-xxxxxxx on top of the mark, developed by the Bureau of Indian Standards (BIS), the national standards body of India

Electric bulb works by heating up a small wire called a filament. Electric current heats the filament so much that it glow. In fact, $90\%$ of the electricity used by a electric bulb is converted to heat and this conversion will produce maximum wastage of electricity.

Treating initially that there is no radiation and on applying voltage to the heater, the temperature of the heater rises. As the temperature rises, the radiation also increases.
As the input power($i^2r$) is constant, the output power should also be constant.
Initially temperature will be increasing and  radiation as well. When the heater reaches a certain temperature, the radiation power equals the input power and the temperature of the heater stops rising.
Thus temperature becomes constant after some time.