Quiz Series-II

1.An SCR behaves as a ……………. switch

• Unidirectional

• Bidirectional

• Mechanical

• None of the above

2.A DIAC is turned on by ………………

• A breakover voltage

• Gate voltage

• Gate current

• None of the above

3.The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ………………. in its first quadrant

• Transistor

• SCR

• UJT

• None of the above

4.The tunneling phenomena is also known as

• Bulk semiconductor phenomena

• Auto electronic phenomena

• Auto electric phenomena

• Esaki phenomena

5.The varactor is usually

• Unbiased

• Reverse biased

• Forward biased

• In the breakdown region

6.The GaAs is preferred to Si for Gunn diodes because it has

• Capability to handle very high power densities

• Higher ion mobility

• Capability to withstand high voltages

• A suitable empty energy band

7.A MOSFET can be operated with ……………..

• negative gate voltage only

• positive gate voltage only

• positive as well as negative gate voltage

• positive gate current only

8.In a FET, there are ……….. pn junctions at the sides

• 3

• 4

• 5

• 2

9.The channel of a JFET is between the …………….

• gate and drain

• drain and source

• gate and source

• input and output

10.A MOSFET differs from a JFET mainly because ………………

• of power rating

• the MOSFET has two gates

• the JFET has a pn junction

• of voltage rating