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Q. Which among the following is known as first electronic amplification device?
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Q. Which among the given elements is non-radioactive
Q. The substance which conducts current in the solid state is
Q. China wares are wrapped in straw paper before packing this is the application of concept of
Q. Who among the following developed the technology of underground nuclear explosion ?
Q. The washing machine works on the principle of
Q. When light enters from air to water, then its
Q. Which of the following effects is not produced by current?
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