How can a simple bulb circuit be used as a tester?

Type: MCQ • Marks: 1

A. Bulb removes need for wires

B. Bulb glows without a cell

C. Bulb glows if tested material completes the circuit

D. Bulb glows when the material is an insulator

Explanation

A glowing bulb indicates current is flowing through the tested material.

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Class 7th Curiosity

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