When the neutral wire in a 3- phase, 4- wire system is disconnected, then: Select one: O a. None of these O b. No remarkable change in the service Oc the service is completely interrupted Od. the loads which are connected between any two line conductors and the neutral are get connected in series and the potential difference across the combined load becomes equal to the line voltage.

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Q1/ Answer by True or False and correct the false sentence: 1- Wire.begin() is used to initiate the wire library in the slave board. 2- In I2C, the clock frequency in range of 50000 to 300000 Hz. 3- Common Ground means the grounds of each board should be connected with each other 4- Pins 0 and 1 are used for external interruption. Solve all please 5- Interruption mode (rising) means: wherever the pin is low. 6- The function getkey () is used to read the size of the array. 7- The segment display is connected only by a common cathode. 8- Delay functions can be used in external interruption. 9- Pin VCC is used to control the LCD display contrast. 10- Serial functions are used with I2C communication.