Which among these are semiconductor devices

• BJT

• LED

• Zener

• Op-Amp

 $\beta$  represents the gain of the transistor 

• True

• False

In transistors conduction occurs due to the flow of

• Minority charge carriers

• Majority charge carriers

• Both majority and minority charge carriers

An n type semiconductor is obtained by doping an intrinsic semiconductor with a

• Pentavalent impurity

• Trivalent impurity

Zener diode is a:

• Lightly doped p-n diode

• Heavily doped p-n diode

• Normally doped p-n diode

• None of the above

A junction diode that can operate in reverse breakdown voltage is called:

• Schottky diode

• Tunnel diode

• Junction diode

• Zener diode

An Op-Amp can be used to perform mathematical operations.

• True

• False

Which of the following are active electronic devices

• Diodes

• Transistors

• Resistors

• Transformers

Which of the following parameter cannot be directly measured with a multimeter

• Frequency

• Temperature

• Power factor

• Resistance

A simple diode rectifier has ripples in the output which can be removed by using:

• A capacitor in series with the load resistance

• A capacitor in parallel with the load resistance

• Both the above mentioned combinations will work

• None of the above