The Electron (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
In which year did Heinrich Geissler invent the first glass vacuum tube?
In which year did Heinrich Geissler invent the first glass vacuum tube?
1855
What is the cathode in a cathode ray tube?
What is the cathode in a cathode ray tube?
The electrode at the negative terminal
What two conditions must be met for a cathode ray tube to function properly?
What two conditions must be met for a cathode ray tube to function properly?
Low pressure and high DC voltage
Why is low pressure essential in a cathode ray tube?
Why is low pressure essential in a cathode ray tube?
Fewer gas molecules mean fewer collisions
Why is an induction coil used instead of a transformer in cathode ray tubes?
Why is an induction coil used instead of a transformer in cathode ray tubes?
CRTs use DC; transformers only work with AC
What did the Maltese cross experiment demonstrate about cathode rays?
What did the Maltese cross experiment demonstrate about cathode rays?
They travel in straight lines
What is fluorescence?
What is fluorescence?
Light emission when struck by particles
What did electric deflection of cathode rays toward the positive plate prove?
What did electric deflection of cathode rays toward the positive plate prove?
Cathode rays are negatively charged
What did the paddle wheel experiment prove about cathode rays?
What did the paddle wheel experiment prove about cathode rays?
They have mass
In Thomson's plum pudding model, what contains the embedded electrons?
In Thomson's plum pudding model, what contains the embedded electrons?
Uniformly distributed positive charge