The coil of wire in an electric room heater or electric cooking heater is called _______.
Element
The heat-producing coil in an electric room or cooking heater is called the heating element. It is made of a high-resistance alloy (typically nichrome) wound into a coil; current through it generates heat via Joule heating, \(H = I^2 R t\).
A “filament” refers to the thin wire in incandescent bulbs (designed to glow as light), while a “circuit” is the whole current path and “cells” are energy sources, not heaters.
Which of the following is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials?
What is the unit of calorific value?
At what temperature (in Fahrenheit) pure water freezes?
The melting point of ice is ____ K.
Which statements about thermodynamic processes and heat engines is/are correct?
1. Work done in irreversible expansion is greater than in quasi-static expansion.
2. Efficiency of an ideal heat engine depends only on reservoir temperatures.
3. Heat flows from cold to hot only with external work.
Why is it generally more severe to be burnt by steam at 100°C than by boiling water at 100°C?
Which one of the following is a bad Thermal Conductor?
In summer season, the top and outer surface of the house are painted white because:
Which of the following is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials?
What is the heat released by a heating filament rated 24 W when it is kept on for 6 seconds?
Space is left between logs of wood when they are burnt, so that:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is: