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Which device tests whether an object carries charge?
ALoudspeaker
BElectroscope
CSeismograph
DThermometer
Answer & Solution
Correct answer: B. Electroscope
1. Two foil strips hang from a metal clip inside a jar.
2. They receive the same charge and swing wide open.
3. This device is an electroscope.
4. So the answer is an electroscope.
_Source: NCERT Class 8 Science, Ch 12 'Some Natural Phenomena'_
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