Tag: does liquid conduct electricity?

Questions Related to does liquid 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:

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

  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

Show answer
Correct Option: A
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 $B$.

Solutions of acids and bases are generally :

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

  1. good conductors of electricity

  2. good conductors of heat

  3. good conductor of both heat and electricity

  4. none of the above

  5. all

Show answer
Correct Option: A
Explanation:

Solutions of acids and bases are generally good conductors of electricity.

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

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

  1. Conduction

  2. Charging by frictionc

  3. Induction

  4. All the above

Show answer
Correct Option: A
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.

How many times, the potential of big drop in comparison to small drops which is made of $8$ dropletes will be, if all the droplets are identical and having equal charge?

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

  1. $2$ times

  2. $4$ times

  3. $3$ times

  4. $8$ times

Show answer
Correct Option: D

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:

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

  1. $\dfrac{5}{2}$

  2. $\dfrac{7}{3}$

  3. $\dfrac{4}{3}$

  4. $\dfrac{5}{3}$

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Correct Option: A

Which of the following is not true about electric charge?

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

  1. Charge is a scalar quantity

  2. Charge on an isolated system is always conserved

  3. A particle having nonzero rest mass can have zero charge

  4. A particle having zero rest mass can have non zero charge

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Correct Option: A

select the incorrect alternative:

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

  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 )

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Correct Option: B

Which solution will conduct the current?

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

  1. Sugar in water

  2. Sugar in ethanol

  3. Iodine in ethanol

  4. $MgCl _2$ in water

Show answer
Correct Option: D
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.

Which statements about conductivity of distilled water are correct?

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

  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

Show answer
Correct Option: A,B
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. 

The best conductor of electricity is a 0.1 M solution of :

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

  1. boric acid

  2. sulphuric acid

  3. acetic acid

  4. propionic acid

Show answer
Correct Option: B
Explanation:

The best conductor of electricity is a 0.1 M solution of sulphuric acid as it is strong electrolyte and thus, ionises completely.