All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work? AC Positive cycle of sine wave DC Negative cycle of sine wave TRUE ANSWER : ? YOUR ANSWER : ?
Different computers are connected to a LAN by a cable and a Interface card Telephone line Special wires Modem TRUE ANSWER : ? YOUR ANSWER : ?
The purpose of skewing of rotor slots in an induction motor is To reduce the magnetic hum of the motor To increase the distributuion factor To increase the breadth factor To reduce the locking tendency of the rotor TRUE ANSWER : ? YOUR ANSWER : ?
What happens to the contents of RAM (Random Access Memory) when the power of the computer is turned off? Content remains intact Content gets corrupted Content is lost Content is transferred to other memory TRUE ANSWER : ? YOUR ANSWER : ?
A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be 0.4 % 5 % 6 % 4 % TRUE ANSWER : ? YOUR ANSWER : ?
Under operating conditions, the secondary of a current transformer is always short ciruited because It protects the primary ciruits It avoids core saturation and high voltage induction It protects the secondary ciruits It is safe to human beings TRUE ANSWER : ? YOUR ANSWER : ?
Distribution transformers have good all day efficiency due to Low voltage Low iron loss Low copper as well as iron loss Low copper loss TRUE ANSWER : ? YOUR ANSWER : ?
The form factor in AC means the ration of R.M.S. value to peak value Peak value to r.m.s value R.M.S. value to average value Peak value to average value TRUE ANSWER : ? YOUR ANSWER : ?
The motor used in celling fans is Universal motor Capacitor start motor Capacitor start capacitor run motor Split phase motor TRUE ANSWER : ? YOUR ANSWER : ?
It is difficult interrupt a capacitive current because Current magnitude is very small Stored energy in the capacitor is very high It has a leading power factor The restriking voltage can be high TRUE ANSWER : ? YOUR ANSWER : ?