- no feedback
In any 3 ½ digit voltmeter, the largest number that can be read is:
- 0999
PIV is applied across a diode when it is:
- reversed biased
Heaviside-Campbell equal ratio bridge is used to measure:
- self-inductance in terms of mutual inductance
Primary cause of linear distortion in an amplifier:
- reactance associated in the circuit and the active amplifying element.
Reverse current in a silicon junction nearly doubles every ____ rise in temperature.
- 6 degrees
The voltage wave is applied across a pure capacitor, as compared to a fundamental voltage, the reactance offered by the capacitor to the third harmonic voltage is:
- one-third
The ratio of energy stored and returned either capacitor or inductor, to the dissipated energy by the device resistance:
- quality factor
Process of adjustment of a scale to agree with the accepted/ certified constant:
- calibration
Any solid object has a maximum of ___ degrees of freedom:
- 6
An IC which is made up of spurting material in a ceramic substrate is called:
- thin film IC
A scale of an indicating instrument whose each division represents the same value is also known as:
- linear scale
An SCR semiconductor is made up of
- 2 P types and 1 N type
Hays bridge is particularly used to measure:
- inductive impedances with large phase angle
Devices used to reduce amplitude of a signal waveform:
- attenuator
A proper biased NPN transistor, the electron in the emitter:
- passes through base to collector
The main reason why electrons tunnel through PN junction is that:
- the depletion region is extremely thin
The efficiency of a class A amplifier can be increased by using:
- transformer coupled load
Produces the highest torque in DC motors:
- Series
Works best at high frequencies:
- Ceramic
Each impedance R+jXL
- correspond to a unique point in the RL plane
- correspond to a unique inductance reactance
- correspond to a unique resistance
Ability of an instrument retains its performance throughout its specified operating life and storage life:
- Stability
Volume of an atom divided by the cell volume:
- Packing Factor
By which method protection against direct lightning strokes and high voltages sweep wave is provided:
- lightning arrester and ground wires
The induced emf in the armature conductor in a dc motor is:
- sinusoidal
Major difference between the construction of lead acid and nicad battery:
- the cell in nicad battery can be replaced
A buck-booster converter with a 30kHz switching frequency is operating with D=0.25. the connected load is 10O. Determine the crirtical frequency so that current IL is continous.
- Lc = (1-D)2 RL
2Fs
Unity follower amplifier is an ________ input impedance, leading to its use as an intermediate stage (buffer) amplifier to prevent small load impedance from loading a source:
- Extremely High
Typical value of CMMR:
- ranging from 100 to 10,000
Typical value of CMMR in dB:
- ranging from 40dB to 80Db
Of the wire is the maximum current, it can safely carry.
- Ampacity
____can keep the display for a longer time for analysis purposes.
- Storage oscilloscope
With permeability tuning, moving the core further into solenoid coil,
- increase the inductance
The best type of core if you need a winding inductance of 1-2 henrys:
- ferromagnetic pot core
For advanced chip, the distance between component is.
- 1 µm
Electrostatic meter:
- can detect ac voltages
What is an electronic oscillator?
- an amplifier with feedback
The current in the solar panel can be increased by:
- connecting solar panel in parallel
A diode that is designed to operate reversed voltage and is manufactured to a process that increases voltage dependent depletion capacitance or junction capacitance:
- varactor diode
In transistor consideration, _________ analysis is based on the assumption that for small changes, the variable interest is a linear function of the other variable and thus the differential can be replaced by its increment.
- stability factor or sensitivity
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