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)

Copper is a conductor and hence, it allows current to flow through it easily. Plastic is not a conductor and hence it doesn’t allow current to flow through it easily. Since, charges can neither be created nor be destroyed, the plastic tube cannot absorb current, and the copper wire cannot create current on its own.