ELECTRONICS 1

The bulky vacuum tube which consumed high power for its operations are replaced by

• Diode Capacitor

• semiconductor

• Resistor

• Vaccum tubes

Electronics actual history began with the invention of

• 
  Diode

• semiconductor

• Resistor

• Vaccum tubes

What are the unit and symbol for current?

• Ampere, Q

• Ampere, I

• Coulomb, I

• Ampere, A

   

Negative ion is known as

• cation

• anion

• positron

• negatron

Electrons have

• Negative charge

• Positive charge

• No charge

• Both charges

   

Current is:

• the repulsion of electrons

• the movement of electrons

• the abundance of electrons

• the presence of a positive charge

Mass number tells us number of

• neutrons only

• electrons only

• particles in the nucleus

• protons only

 Atomic number of sodium is 11 and its mass number is 23, then number of protons and neutrons in an atom of sodium is

• 11 and 11

• 11 and 23

• 23 and 11

• 11 and 12

A Resistor has value of 100Ω, ± 10% it's value may vary from_______

• 90Ω to110Ω

• 99Ω to 101Ω

• 95Ω to 105Ω

• 90Ω to 115Ω

Which of the following is an active element in the circuit

• Resistance

• Inductance

• Capacitance

• Current source