Chemical Effects of Electric Current – 2

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason? What is the first statement of this audio clip?

• The deflection in magnetic needle shows that the circuit is complete.

• And the solution conducts electricity.

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason? What is the second statement of this audio clip?

• The deflection in magnetic needle shows that the circuit is complete.

• And the solution conducts electricity.

Which metal is usually electroplated on car parts such as bumpers and bicycle handlebars made of steel?

Which metal is electroplated on iron for making cans and why? What is the first statement of this audio clip?

• Tin is electroplated on iron for making cans because tin is less reactive than iron.

• Thus, food does not come into contact with iron and is protected from getting spoilt.

Which metal is electroplated on iron for making cans and why? What is the second statement of this audio clip?

• Tin is electroplated on iron for making cans because tin is less reactive than iron.

• Thus, food does not come into contact with iron and is protected from getting spoilt.

Why is the current in the circuit weak? What is the first statement of this audio clip?

• Though a material may conduct electricity, it may not conduct it as easily as a metal.

• As a result, the circuit of the tester may be complete and yet the current through it may be too weak to make the bulb glow.

Why is the current in the circuit weak? What is the second statement of this audio clip?

• Though a material may conduct electricity, it may not conduct it as easily as a metal.

• As a result, the circuit of the tester may be complete and yet the current through it may be too weak to make the bulb glow.

Why do brand new cycles have shiny handlebars and wheel rims what will happen if these are scratched? What is the first statement of this audio clip?

• A brand new bicycle has shiny handlebar and wheel rims.

• However, if these are accidentally scratched, the shiny coating comes off revealing a not so shiny surface beneath.

Why do brand new cycles have shiny handlebars and wheel rims what will happen if these are scratched? What is the second statement of this audio clip?

• A brand new bicycle has shiny handlebar and wheel rims.

• However, if these are accidentally scratched, the shiny coating comes off revealing a not so shiny surface beneath.

Why is it dangerous to touch a working electrical appliance with wet hands? What is the first statement of this audio clip?

• It is dangerous to touch a working electrical appliance with wet hands because the tap water is a good conductor of electricity.

• Due to which it may conduct electric current and gives us an electric shock.