Liquids conduct electricity - class-VIII
| Description: liquids conduct electricity | |
| Number of Questions: 37 | |
| Created by: Anumati Koshy | |
| Tags: electricity chemical effects of electric current electrical appliances in everyday life effect of electric current physics electrical conductivity of liquids |
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:
Solutions of acids and bases are generally :
Charging a body by simply touching it is called ........ .
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?
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:
Which of the following is not true about electric charge?
select the incorrect alternative:
Which solution will conduct the current?
Which statements about conductivity of distilled water are correct?
The best conductor of electricity is a 0.1 M solution of :
Pure water is a ________ conductor of electricity.
Which of the following statements is false?
What happens when you join the free ends of the tester for more than a few minutes?
Which of the following statement is correct while conduction of electricity in lemon juice?
Which of the following is a poor conductor of electricity?
Which of the following devices can be used to detect a weak current?
When the liquid between two ends allow electric current, then :
When salt is dissolved in distilled water, we obtain salt solution which is a / an :
Which of the following might be the reason that the current in the circuit is weak?
Which of the following is not true about LED?
Which of the following would show deflection in the compass needle, the moment you dip the free ends of the tester?
What happens when the current passing through the circuit is too weak?
Which of the following statement(s) is correct while conducting electricity through vegetable oil?
It is not safe to carry out electrical repair works outdoor during rain because :
In LEDs, the longer lead is connected to ................ and the shorter lead is connected to .................. .
Which of the following, when dissolved in distilled water, makes it a good conductor?
LED stands for :
LED is better than bulb to use in a tester as :
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection due to:
Which of the following solution will not make the bulb glow?
When electric current passes through the filaments of a bulb, it starts emitting light due to :
The chemical effect produced by an electric current depends on:
Sea water is a good conductor of electricity but distilled water is not because :
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 :
$H _2SO _4$ solution attached to a bulb in a beaker:
The specific charge of electrons is less than the specific charge of protons.
Statement 1: A solution of NaCI will conduct electricity.
Statement 2: NaCI will not form ions in solution.