Table of Contents
- 1 Why room heaters have polished reflectors at the back of the heating element?
- 2 Is it unhealthy to use an electric heater to heat your bedroom?
- 3 What are the effects of heat explain?
- 4 What kind of mirror is used in a solar furnace give reason?
- 5 Is it safe to leave electric heater on all night?
- 6 Why does the cord of an electric heater not glow but coil does?
- 7 Why do room heaters have polished reflector at the back of the heating element?
- 8 Why does the cord of my electric heater not glow?
Why room heaters have polished reflectors at the back of the heating element?
Explanation:Room heaters have polished reflectors because bright ,polished reflectors reflect heat more efficiently and hence more heat is generated in front of the heater ,at the same time since they reflect heat the appliance or the unit is saved from getting heated or catching fire.
Which mirror is used in room heater?
Question: Electric room heaters use a concave mirror to reflect infrared (IR) radiation from hot coils. Note that IR follows the same law of reflection as visible light.
Is it unhealthy to use an electric heater to heat your bedroom?
However, most people forget about an important thing electric heaters are actually harmful to your health. The biggest flaw of the electric heater is that it sucks up the moisture present in the air. As a result, the air turns dry which has a bad impact on your skin. It leads to the problem of dry and rough skin.
Why do electric heaters have coils?
Unlike a gas stove that comes in various parts, an electric stove is very easy to clean and maintain. This helps make it durable and long-lasting. An electric heating coil ensures a consistent supply of thermal energy so that your food is cooked uniformly and is not at risk of undercooking or overcooking.
What are the effects of heat explain?
Answer: when heat is supplied to a body its temperature rises. when a material body, Solid, liquid,gas is given heat energy, it’s temperature increases. w hen the hot body gives out heat energy it’s temperature decreases.
Which mirror will you prefer to reflect light for heating solar furnace?
So, a concave mirror is used in a solar furnace. The solar furnace is kept practically at the focal point of the broad concave reflector. The concave reflector guides the heat rays of the Sun on the furnace and attain the maximum temperature. Hence, a concave mirror is used in a solar furnace.
What kind of mirror is used in a solar furnace give reason?
A concave mirror is used in a solar furnace. A furnace placed at the focus of a concave reflector gets heated up because the reflector focuses the sun’s heat rays on it.
Why do we put water in front of a heater?
The idea is that the heat of the air from the heater will pull water from the dish into the air, thereby adding humidity to dry, indoor air. The hot moist air will “loosen” the congestion and allow it to drain out of the head or chest.
Is it safe to leave electric heater on all night?
You should not leave your heater running overnight while you sleep. Leaving a heater on overnight or unattended not only creates a potential safety risk, but it can also dry out your skin and nasal passages. (A discomfort in winter months that no one wants!)
Which coil is used in electric heater?
The most common Nickel-based coil material is nichrome. Nichrome is an alloy containing 80% Nickel and 20% Chrome. Nichrome is predominantly used in high-temperature applications up to 1250℃.
Why does the cord of an electric heater not glow but coil does?
The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper or aluminium is very law so it does not glow.
What are the 4 effects of heat?
The important effects of heat on an object are :
- Raises the temperature.
- Increases volume.
- Changes state.
- Brings about chemical action.
- Changes physical properties.
Why do room heaters have polished reflector at the back of the heating element?
Why do room heaters have polished reflector at the back of the heating element? This protects the rest of the unit from heat. It’s effectively an insulator. Q: Why do room heaters have polished reflector at the back of the heating element? Write your answer…
How does a concave reflector work in a room heater?
A Concave Reflector Electric room heaters use a concave mirror to reflect infrared (IR) radiation from hot coils. Note that IR follows the same law of reflection as visible light. Given that the mirror has a radius of curvature of 50.0 cm and produces an image of the coils 3.00 m away from the mirror, where are the coils?
Why does the cord of my electric heater not glow?
The cord to your heater, like the cord to your lamp with that glowing white light bulb in it, does not glow itself because the wires in the cord are large enough to carry the current without heating themselves nearly enough to emit any kind of glow.
How do electric radiators and electric convector heaters work?
Electric radiators (like the one in our top photo) make heat with glowing red bars (essentially just coiled, wire heating elements that throw out heat by radiation ), while electric convector heaters generally have concentric, circular heating elements positioned in front of electric fans (so they transport heat more quickly by convection ).