Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

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

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection due to:

  1. electrical effect

  2. mechanical effect

  3. magnetic effect

  4. lighting effect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection due to magnetic effect . This magnetic effect is produced by electric current, passing through it.

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

When electric current passes through the filaments of a bulb, it starts emitting light due to :

  1. heating effect of electric current.

  2. magnetic effect of electric current.

  3. chemical effect of electric current.

  4. lighting effect of electric current.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When electric current passes through the filaments of bulb, it starts emitting light due to heating effect of electric current.

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

The chemical effect produced by an electric current depends on:

  1. the nature of electrode

  2. the tester

  3. the conducting solution

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Because if the liquid is conducting i.e electrolyte only then free ions will be present . Only in that case electric current will be able to produce chemical effect otherwise not.

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

Sea water is a good conductor of electricity but distilled water is not because :

  1. sea water contains mineral salts.

  2. distilled water contains mineral.

  3. both A and B

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

Sea water is a good conductor of electricity but distilled water is not because sea water contains mineral salts.

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, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dim 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

Liquid $A$ is a better conductor than liquid $B.$

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

$H _2SO _4$ solution attached to a bulb in a beaker:

  1. cannot light the bulb

  2. can light the bulb

  3. diffuses the bulb

  4. none of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An acid in aqueous medium releases hydronium ions. Hence, it is able to conduct electricity. When sulphuric acid in aqueous medium is attached to a bulb in a beaker, current flows through it and lights the bulb.

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

The specific charge of electrons is less than the specific charge of protons.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The specific charge of a particle is the charge that it carries per unit mass,i.e,


$q _m=\dfrac{q}{m}$

A proton and an electron carries the same magnitude of charge($q$) their specific charge is inversely proportional to their mass,i.e,

$q _m\propto\dfrac{1}{m}$

The mass of a proton is greater than that of an electron and hence

$q _{m _p}<q _{m _e}$

Hence, the above statement is incorrect

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

Statement 1:  A solution of NaCI will conduct electricity. 
Statement 2:  NaCI will not form ions in solution. 

  1. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

  2. Both the Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

  3. Statement 1 is correct but Statement 2 is not correct.

  4. Statement 1 is not correct but Statement 2 is correct.

  5. Both the Statement 1 and Statement 2 are not correct.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A solution of $NaCl$ conduct electricity because in aqueous solution $NaCl$ dissociate into $Na^+$ and $Cl^-$ ions, which in solution are free to move and hence, conduct electricity.