Tag: electrical conductivity of liquids

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Questions Related to electrical conductivity of liquids

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

A tester is used to check the conduction of electricity through two liquids, labeled $A$ and $B$. It is found that the bulb of the tester glows brightly for liquid $A$ while it glows very dimly for liquid $B$. You would conclude that:

  1. liquid $A$ is a better conductor than liquid $B$
  2. liquid $B$ is a better conductor than liquid $A$

  3. both liquids are equally conducting

  4. conducting properties of liquid cannot be compared in this manner
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The amount of current flowing through a conducting solution depends on the conductivity of the solution. More the conductivity, more current passes through the solution and vice-versa. Hence, the conductivity of liquid $A$ is more than the conductivity of liquid $B$.

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

Charging a body by simply touching it is called ........ .

  1. Conduction

  2. Charging by frictionc

  3. Induction

  4. All the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transfer of either heat or charge or an physical qty by touching is called conduction while rubbing against each other is know as friction. And charging by induction does not involve any contact with the surface whatever so.

Charging by simply touching is called conduction.

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

A long parallel straight conductors carry $i _{1}$ and $i _{2}(i _{1} > i _{2})$. When the currents are in same direction, the magnetic field at a point midway between the wires is $20 \mu T$. If the direction of $i _{2}$ is reversed, the field becomes $50 \mu T.$ The ratio of the current $i _{1}/ i _{2}$ is:

  1. $\dfrac{5}{2}$
  2. $\dfrac{7}{3}$
  3. $\dfrac{4}{3}$
  4. $\dfrac{5}{3}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

select the incorrect alternative:

  1. The charge gained by the uncharged body from a changed body due to conduction is of of the same nature of charge initially present on charged body

  2. the magnitude of charge increases with the increase in velocity of charge

  3. charge can not exist with out matter although matter can exist with out charge.

  4. Between two non-magnetic substances is true test of electrification ( electrification means body has net charge )
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Charge is an invariant quantity in special relativity; its magnitude does not change with velocity. Option C is also technically false as charge is a property of matter, but B is a more fundamental error regarding the definition of charge.

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

Which solution will conduct the current?

  1. Sugar in water

  2. Sugar in ethanol

  3. Iodine in ethanol
  4. $MgCl _2$ in water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In water magnesium chloride ionizes to form ions and these ions conduct electricity. Sugar and iodine are non electrolytes. They do not dissociate into ions in aqueous solution. Hence, they do not conduct electricity.

Multiple choice physics electrical conductivity of liquids does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

Which statements about conductivity of distilled water are correct?

  1. It possesses almost non-conducting nature

  2. It is obtained by distillation of water several times

  3. It is contaminated with little acid

  4. None of the above
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

Water is a weak electrolyte and is almost non conducting in nature as hardly any ions are present in pure water. However if impurities are present, then the conductivity will be high. In order to obtain the true value of the conductivity of water, these ions are removed by distilling the water several times.