8th Class Science Chemical Effects of Electric Current Question Bank Chemical Effects of Electric Current

There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this?

(i) The connections of the circuit Q may be loose.

(ii) The liquid in Q may have small conductivity.

(iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

A) Only (i) and (ii)

B) Only (ii) and (iii)

C) Only (i)

D) Only (ii)

Correct Answer: B

Solution :

Both liquids conduct electricity. In figure both the circuits are tightly connected as bulbs glow. Reasons are given in (ii) and (iii).