PHYSICS FORM 5 ELECTRONIC

Which of the following statements is correct for cathode rays?

• It is a radioactive radiation

• It moves slowly at low temperatures

• It can be deflected by a magnetic field

• Its kinetic energy can be converted to elastic potential energy

The following is a statement regarding electron emission

"Emission of free electrons from a heated metal surface"

This statement is a definition for

• Cathode rays

• Thermionic radiation

• Thermal radiation

• Photoelectric effect

The diagram shows the structure of a vacuum tube where cathode rays are emitted from the cathode metal Which part of the cathode ray moves with a uniform velocity?

• PQ

• RS

• QR

• PR

The diagram shows a symbol that represents an electronic component.

What is an Electronic component?

• Diod

• Resistor

• Capacitor

• Transistor

The diagram shows two circuits, S and T connected with similar diodes and bulbs.

What will happen to the bulbs in both circuits?

• Litar S

  Light up

  Litar T

  Light up

• Litar S
  No flame

  Litar T

  Light up

• Litar S

  Light up

  Litar T

  No flame

• Litar S
  No flame

  Litar T

  No flame

The diagram shows two types of resistors M and N.

Which of the following is true?

• Resistance M

  Low when light intensity is high

  Resistance N

  Low when light intensity is low

• Resistance M

  Low when light intensity is high

  Resistance N

  Low when the temperature is high

• Resistance M

  Low when the temperature is high

  Resistance N

  Low when the temperature is low

• Resistance M

  Low when light intensity is low

  Resistance N

  Low when the temperature is low

The diagram shows the symbol for a transistor

What are the names of terminals P, Q and R?

• P - Collector

  Q -Base

  R - Emitter

• P - Base

  Q - Collector

  R - Emitter

• P - Collector

  Q - Emitter

  R - Base

• P - Emitter

  Q - Base

  R - Collector

If C, B and E have the common meaning of a transistor,

which of the following transistors is labeled correctly?

• 
• 
• 
• 

The diagram shows the inside of an electronic circuit What is the function of the Z component?

• To change d.g.e battery

• To change the current through resistors X and Y

• To raise the voltage of resistor X

• To allow current to flow in one direction only

The diagram shows a transistor circuit

Which of the following causes the siren to sound?

• Resistor R is removed

• The environment is hot

• The environment is cool

• The battery terminals are reversed