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प्रश्न
Name a common device where a hot cathode ray tube is used.
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उत्तर
Hot cathode ray tube is used in T.V.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
What are the uses of radioactive isotopes in following?
(a) Medical field,
(b) Agriculture,
(c) Industries?
A nucleus of an element X which has the symbol `""_84^202` X emits an alpha particle and then a beta particle. The final nucleus is `""_"b"^"a"` Y Find a and b.
State three safety precautions that you would take while handling the radioactive substances.
State two characteristics of the substance used as thermionic emitter.
What is the value of the speed of gamma radiations in air or vacuum?
State three ways of obtaining an electron-beam.
