Question

There are a bulb and a battery, and a person connects them using a plastic tube. The bulb doesn’t glow. Instead, when he uses a copper wire to connect them, the bulb glows. Which of the following is true?
i) Copper allows current to flow easily
ii) Plastic tube doesn’t allow the current to flow easily
iii) Plastic tube absorbs the current.
iv) Copper wire generates extra current

• A. i) and ii)
• B. ii) and iv)
• C. iii) and iv)
• D. i), iii) and iv)

Answer 1

The correct option is A

i) and ii)

In the given observation, the bulb does not glow when it is connected using a plastic tube and it glows when the circuit is completed using a copper wire. This is because an electric conductor is required to complete the circuit and hence the bulb glows.

Copper is a good conductor and hence, it allows current to flow through it easily. Plastic is not a good conductor and it does not allow the flow of current through it.