Tag: do liquids conduct electricity?

Questions Related to do liquids conduct electricity?

Which of the following would show deflection in the compass needle, the moment you dip the free ends of the tester?

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

  1. Tap water, vinegar

  2. Tap water, vegetable oil

  3. Tap water, honey

  4. Vegetable oil, honey

Show answer
Correct Option: A
Explanation:

Tap water and vinegar are good conductors of electricity and hence, the compass needle could show deflection.

What happens when the current passing through the circuit is too weak?

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

  1. The filament does not get heated sufficiently and the bulb does not glow.

  2. The filament gets heated but the bulb does not glow.

  3. The filament does not get heated but the bulb glows.

  4. The filament gets heated and the bulb glows.

Show answer
Correct Option: A
Explanation:

When the current through the circuit is too weak, the filament does not get heated sufficiently and the bulb does not glow.

Which of the following statement(s) is correct while conducting electricity through vegetable oil?

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

  1. The liquid (vegetable oil) allows the electric current to pass through. Since, it is a good conductor of electricity.

  2. The circuit of the tester is complete but the bulb does not glow.

  3. The circuit of the tester is not complete and hence the bulb does not glow.

  4. Both A and B

Show answer
Correct Option: C
Explanation:

When the liquid (vegetable oil) does not allow the electric current to pass, the circuit of the tester is not complete and the bulb does not glow.

It is not safe to carry out electrical repair works outdoor during rain because :

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

  1. rainwater is a good conductor of electricity

  2. rainwater contains mineral salts

  3. rainwater is a poor conductor of electricity

  4. both A and B

Show answer
Correct Option: D
Explanation:

It is not safe to carry out electrical repair works outdoor during rain because it contains small amounts of mineral salts naturally present in it. This water is thus a good conductor of electricity.

In LEDs, the longer lead is connected to ................ and the shorter lead is connected to .................. .

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

  1. negative terminal; positive terminal

  2. positive terminal; negative terminal

  3. negative terminal; neutral terminal

  4. positive terminal; neutral terminal

Show answer
Correct Option: B
Explanation:

In LEDs, the longer lead is connected to the positive terminal and the shorter lead is connected to the negative terminal.

Which of the following, when dissolved in distilled water, makes it a good conductor?

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

  1. Potassium iodide

  2. Common salt

  3. Potassium dichromate

  4. All of the above

Show answer
Correct Option: D
Explanation:

Salts, when dissolved in distilled water make it a good conductor.

LED stands for :

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

  1. light emitting diode

  2. loose emitting diode

  3. light emission device

  4. light emitting device

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Correct Option: A
Explanation:

LED stands for Light emitting diode.

LED is better than bulb to use in a tester as :

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

  1. it glows even when weak current passes through it.

  2. it emits more light.

  3. it is cheaper.

  4. all of the above

Show answer
Correct Option: A
Explanation:

LED is better than bulb to use in a tester as it glows even when a weak current passes through it.

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

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

  1. electrical effect

  2. mechanical effect

  3. magnetic effect

  4. lighting effect

Show answer
Correct Option: C
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.

Which of the following solution will not make the bulb glow?

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

  1. Copper sulphate

  2. Sodium chromate

  3. Potassium dichromate

  4. Sugar

Show answer
Correct Option: D
Explanation:

Sugar solution will not make the bulb glow.