Electronic Devices [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 10 - 15 of 107
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Question 10
Question MCQ▾
Energy bands in solids are a consequence of
Choices
Choice (4) | Response | |
---|---|---|
a. | Heisenberg՚s uncertainty principle | |
b. | Bohr՚s theory | |
c. | Pauli՚s exclusion principle | |
d. | Ohm՚s Law |
Question 11
Question MCQ▾
The approximate ratio of resistances in the forward and reverse bias of the PN-junction diode is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 12
Question MCQ▾
Let Nh and Ne be the number of holes and conduction electrons respectively in a semiconductor. Then
Choices
Choice (4) | Response | |
---|---|---|
a. | Ne > Nh in an intrinsic semiconductor | |
b. | Nh = Ne in an intrinsic semiconductor | |
c. | Nh = Ne in an extrinsic semiconductor | |
d. | Nh > Ne in an intrinsic semiconductor |
Question 13
Question MCQ▾
If Ne and Vd be the number of electrons and drift velocity in a semiconductor. When the temperature is increased,
Choices
Choice (4) | Response | |
---|---|---|
a. | Ne decreases and Vd increases | |
b. | Ne and Vd decreases | |
c. | Ne and Vd increases | |
d. | Ne increases and Vd decreases |
Passage
A student performs an experiment for drawing the static characteristic curve of a triode valve in the laboratory. The following data were obtained from the linear portion of the curves:
Grid voltage Vg (Volt) | -2.0 | -3.5 | -2.0 |
Plate voltage Vp (Volt) | 180 | 180 | 120 |
Plate current IP (mA) | 15 | 7 | 10 |
Question 14 (1 of 3 Based on Passage)
Question MCQ▾
Calculate the plate resistance rp of the triode valve?
Choices
Choice (4) | Response | |
---|---|---|
a. | 1.2 × 104 ohm | |
b. | 1.3 × 104 ohm | |
c. | 0.12 × 104 ohm | |
d. | 1.4 × 104 ohm |
Question 15 (2 of 3 Based on Passage)
Question MCQ▾
Calculate the mutual conductance (gm) of the triode valve?
Choices
Choice (4) | Response | |
---|---|---|
a. | 53.3 × 10-3 ohm-1 | |
b. | 4.32 × 10-3 ohm-1 | |
c. | 5.33 × 10-3 ohm-1 | |
d. | 5.00 × 10-3 ohm-1 |