14. Chemical Effects of Electric Current – Class 8 Science Chapter 8 NCERT Important Questions and Answers for CBSE

Marks-Wise Important Questions and Answers for Class 8 Science Chapter 14: Chemical Effects of Electric Current (CBSE)

Chapter 14: Chemical Effects of Electric Current

1.An electric current can produce
(a)heating effect only.
(b)chemical effect only.
(c)magnetic effect only.
(d)chemical, heating, and magnetic effects.
 

2.Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in Fig.14.1.

Photo

Boojho’s ExperimentPaheli’s Experiment

(A) (B)
Fig.14.1
They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that
(a)higher current is flowing through the circuit in setup A.
(b)higher current is flowing through the circuit in setup B.
(c)equal current is flowing through both the circuits.
(d)the current flowing through the circuits in the two setups cannot be compared in this manner.

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Posted 3 months ago