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Thermal runaway is not possible in FET because as the temperature of FET increases
A
The mobility decreases
B
The transconductance increases
C
The drain current increases
D
None of the above
Correct Answer:
The mobility decreases
Which one of the following is true with regard to a CPU having a single interrupt request line and single interrupt grant line? i) Neither vectored nor multiple interrupting devices is possible. ii) Vectored interrupts is not possible but multiple interrupting devices is possible. iii) Vectored interrupts is possible and multiple interrupting devices is not possible. iv) Both vectored and multiple interrupting devices are possible.
A
iii
B
i, iv
C
ii, iii
D
iii, iv
Thermal stability is dependent on thermal runaway which is_________
A
an uncontrolled positive feedback
B
a controlled positive feedback
C
an uncontrolled negative feedback
D
a controlled negative feedback
A thermal reservoir at 538°C is brought into thermal communication with another thermal reservoir at 260°C, and as a result 1055 kJ of heat is transferred only from the higher to lower temperature reservoir. Determine the change in entropy of the universe due to the exchange of heat between these two thermal reservoirs.
A
0.378182 kJ/K
B
0.478182 kJ/K
C
0.578182 kJ/K
D
0.678182 kJ/K
Consider the following statements and choose the correct answer:
1. At low temperature, the viscosity of water increases
2. Low temperature retards the growth of the roots
3. At low temperature, viscosity of protoplasm and cell wall decreases
4. Low temperature increases the metabolic activities of the root cells
A
Only 1 and 2 are true
B
Only 1, 2 and 3 are true
C
Only 3 is true
D
Only 3 and 4 are true
Presence of moisture in the thermal insulating material increases thermal insulation while the presence of air spaces decreases thermal insulation.
A
True
B
False
In the blast furnace, as the oxygen percentage in air blast increases, the
P. flame temperature increases
Q. blast volume increases
R. blast volume decreases
S. flame temperature decreases
A
P, Q
B
P, R
C
R, S
D
Q, S
Thermal runaway is_________
A
an uncontrolled positive feedback
B
a controlled positive feedback
C
an uncontrolled negative feedback
D
a controlled negative feedback
Which of the following biasing techniques are prone to thermal runaway?
A
self bias
B
collector to base bias
C
fixed bias
D
the biasing technique is identified by temperature effect
The condition to be satisfied to prevent thermal runaway?
A
∂PC/∂TJ > 1/Q
B
∂PC/∂TJ < 1/Q
C
∂PC/∂TJ > 1/Q
D
∂PC/∂TJ < 1/Q
Which of the following biasing techniques are affected by thermal runaway?
A
self bias
B
collector to base bias
C
fixed bias
D
the biasing technique is identified by temperature effect