Tag: electricity
Questions Related to electricity
Electrical charge can be transferred from a charged object to another through
-
vacuum
-
air
-
insulator
-
conductor
We know that a conductor has free electrons and due to this, the conductor is able to transfer electric charge (the current).
Earthing is provided in buildings to protect it form
-
lightning
-
leakage of electric current
-
cyclone
-
thunderstorm
Earthing means to connect electrical system to earth or soil in such a manner as it ensures an immediate discharge of electrical energy night out any danger. it is essentially done to product the building from any miss happening.
Ordinary rubber is an insulator. But the special rubber tyres of aircrafts are made slightly conducting. Why is this necessary?
-
The charged developed due to atmospheric electricity finds its way to the earth
-
The charged developed due to friction finds its way to the earth
-
The charged developed due to induction finds its way to the earth
-
The charged developed due to the aircraft engine finds its way to the earth
Ordinary rubber is an insulator. But the special rubber tyres of aircrafts are made slightly conducting. This is because during landing or takeoff, the tyres of aircrafts get charged due to friction between tyres and the ground. In such case, the tyres are slightly conducting, the charges developed on the tyres will not stay on them and find its way to earth.
__________ is a good conductor of electricity.
-
Iodine
-
Graphite
-
Sulphur
-
Bromine
Non-metals are the bad conductor of electricity except one i.e Graphite(made of carbon).Hence iodine,sulphur and bromine do not conduct electricity.
-
True
-
False
Ionic Liquids like alcohol and ether frequently share a number of
attractive properties that distinguish them from conventional organic
solvents, such as low (and even effectively-null) vapor pressure, a wide
liquid range, low flammability, high conductivity (e.g., ionic,
thermal), excellent stability (e.g., thermal, chemical, redox,
radiochemical), a wide electrochemical potential window, and the ability
to act as surprisingly good solvents towards many substances.
Ionic Liquids are a new class of purely ionic, salt-like materials that are liquid at unusually low temperatures.
Hence, the statement is true.
State whether true or false :
-
True
-
False
False.
State whether true or false :
-
True
-
False
False.
$CO _2$(aq) $+$ $H _2O$(l) <==> $H^+$ $+$ $HCO^{3-}$
$1000$ years ago, that would have pretty much been it. But today we have lots more pollutants in the air that contribute to acid rain and to the conductivity of rainwater. $SO _3$ dissolves in water to make $H _2SO _4$, which exists as $H^+$ and $HSO^{4-}$ ions. $N _2O _5$ dissolves in water to make $HNO _3$, which exists in water as $H^+$ and $NO^{3-}$. These are but a few of the substances that can produce the ions in solution that will make rainwater a conductor.
Which of the following is best insulator?
-
carbon
-
paper
-
ebonite
-
graphite
Out of the given options, ebonite is best insulator. Whereas, carbon and graphite are fair conductors and ebonite is a better insulator than paper.
-
True
-
False
Given statement is that "ebonite is a good conductor of electricity". This statement is false. This is because ebonite is a poor conductor of electricity, it is an insulator. Electrons cannot move easily within it, and also it has no free electrons present for conductivity.
Ordinary tap water conducts electric current due to :
-
the dissolved salts in it
-
higher purity of the water
-
the bacteria present in it
-
none of these
Tap water conducts electricity since there are small amounts of calcium and magnesium salts dissolve in it, pure water (distilled or de-ionised) has nothing at all in it that can conduct electricity. This is because water itself isn't a conductor. However, when one dissolves ionic compound such as salts, the ions becomes loosely bound to each other which makes tap water a good conductor of electricity.