
Chapter 5 Form 5 - Electronic
Quiz
•
Physics
•
11th Grade
•
Practice Problem
•
Medium
Nurul Asma Johari
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The emission of electrons from the surface of a heated metal is called
Vaporization
Condensation
Cathode emission
Thermionic emission
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
An electron is accelerated between anode and cathode through a potential difference 8000 V. What is the maximum speed of the electron?
[ e =1.6 x 10 -19 C and m= 9 x 10 -31 ]
5.3 x 107 m s-1
4.3 x 106 m s-1
3.3 x 104 m s-1
2.3 x 103 m s-1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a vacuum tube, the high voltage across anode and cathode used to
control the fialament temperature
control the number of electrons
produce narrow beam electrons
accelerate electrons with a high speed
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which diagram shows the correct movement of an electron beam in an electric field?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of a diode?
Stores electric charge
Acts as a current amplifier
Acts as an automatic switch
Allows the current to pass in one direction only
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diagram shows a full wave rectifier circuit.
The output waves become smooth because
the resistance of the resistor is always increasing and decreasing
the charges in the capacitor is always increasing and decreasing
the number of electrons in the CRO is always increasing and decreasing
the current flows through the diode is always increasing and decreasing
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following diagram shows the bulb does not light up.
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