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Browse complete papersWhich class of IPv4 addresses supports the largest number of host addresses in a computer network?
Class A
Class B
Class C
Class D
Correct answer
Class A
The primary reason for the increase in resistance of metallic conductors with temperature is _____________.
Atomic collisions inside the conductor increase
Conducting path inside the material becomes shorter
Number of free electrons becomes zero
Atomic vibrations inside the conductor decrease
Correct answer
Atomic collisions inside the conductor increase
What does the instruction ORA B do in 8085?
Adds B to accumulator
Subtracts B from accumulator
Performs AND between accumulator and B
Performs logical OR between accumulator and B
Correct answer
Adds B to accumulator
Which characteristic primarily defines how accurately the vertical deflection system of a CRO displays signals of different amplitudes and frequencies?
Accelerating anode voltage in the electron gun
Phosphor persistence on the CRT screen
The gain and frequency response of the vertical amplifier
Operation of the sweep circuit and retrace interval
Correct answer
Accelerating anode voltage in the electron gun
An op amp acting as a comparator typically operates in:
Closed-loop mode with negative feedback
Unity gain mode
Open-loop mode
Linear region only
Correct answer
Closed-loop mode with negative feedback
A motor draws a starting current much higher than its running current. What should be considered when selecting a relay?
Relay selection should focus only on minimum coil voltage
Relay contact rating should match only the motor running current
Relay selection depends solely on the coil voltage specification.
Relay contact rating must exceed the motor's peak starting current
Correct answer
Relay selection should focus only on minimum coil voltage
In the Hexagonal cell model, where is the Base Transceiver Station (BTS) typically located to provide uniform coverage?
Exactly at the center of the hexagon
Along the longest edge of the cell
Outside the cell boundary to avoid interference
At any one of the six corners
Correct answer
Exactly at the center of the hexagon
A 2-input NOR gate has one input permanently connected to logic LOW (0). How does the output behave with respect to the other input?
Output is the complement of the other input
Output follows the other input directly
Output is always LOW
Output is always HIGH
Correct answer
Output is the complement of the other input
If the modulating signal is a constant DC voltage, the output of a Phase Modulator will be:
A signal with increasing frequency.
Zero.
A constant frequency signal with a fixed phase shift.
A signal with varying amplitude.
Correct answer
A signal with increasing frequency.
Why is earthing necessary for electrical equipment?
To protect people from electric shock
To improve light brightness
To increase wire length
To decrease power consumption
Correct answer
To protect people from electric shock