Electronics and Communication Engineering - Electronic Devices and Circuits

21.
A sample of N-type semiconductor has electron density of 6.25 x 1018/cm3 at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature the hole density works out to be
106/cm3
108/cm3
1010/cm3
10l2/cm3
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
Mobility is directly proportional to Hall coefficient.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

23.
n channel FETs are better as compared to p-channel FET because
they are more efficient
they have high switching time
they have higher input impedance
mobility of electrons is more than that of holes
Answer: Option
Explanation:
No answer description is available. Let's discuss.

24.
An n channel depletion type MOSFET has
lightly doped p substrate and highly doped n source and drain
highly doped p substrate and highly doped n source and drain
highly doped p substrate and lightly doped n source and drain
lightly doped n substrate and highly doped n source and drain
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
In a JFET avalanche breakdown occurs when VDS = 22 V and VGS = 0. If VGS = -1 V, the avalanche breakdown will occur at
VDS = 22 V
VDS more than 22 V
VDS equal to or more than 22 V
VDS less than 22 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.