Related Questions

The forward voltage drop across a silicon diode is about ___________
A 2.5 V
B 3 V
C 10 V
D 0.7 V
An ideal crystal diode is one which behaves as a perfect ___________ when forward biased.
A conductor
B insulator
C resistance material
D none of the above
A Zener diode that has very narrow depletion layer will breakdown by mechanism
A Avalanche
B Zener
C Both avalanche and Zener
D None of the above
What is true about the breakdown voltage in a Zener diode?
A It decreases when load current increases
B It destroys the diode
C It equals current times the resistance
D It is approximately constant
A zener diode has ___________ breakdown voltage
A undefined
B sharp
C zero
D none of the above
If the doping level of a crystal diode is increased, the breakdown voltage___________
A remains the same
B is increased
C is decreased
D none of the above
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
A mercury is a metal.
B density of mercury is greater than that of water.
C cohesion of mercury is greater than its adhesion with glass.
D cohesion of water is greater than its adhesion with glass.
The ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$

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