Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: chhattisgarh board-2019

Describe an a.c. L-C-R circuit on the basis of the following points: Expression for resonance frequency.

The teacher of Harshit's school took the students on a study trip to a power generating station, located nearly $200 \mathrm{km}$ away from the city. The teacher explained that electrical energy is transmitted over a long distance to their city, in the form of alternating current (AC) raised to a high voltage. At the receiving end in the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Harshit listened to the teacher and asked questions about how the AC is converted to a higher or lower voltage:

Name the device used to change the alternating voltage to a higher or lower value.

The teacher of Harshit's school took the students on a study trip to a power generating station, located nearly  away from the city. The teacher explained that electrical energy is transmitted over a long distance to their city, in the form of alternating current (AC) raised to a high voltage. At the receiving end in the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Harshit listened to the teacher and asked questions about how the AC is converted to a higher or lower voltage:

State causes for power dissipation in this device.

The teacher of Harshit's school took the students on a study trip to a power generating station, located nearly away from the city. The teacher explained that electrical energy is transmitted over a long distance to their city, in the form of alternating current (AC) raised to a high voltage. At the receiving end in the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Harshit listened to the teacher and asked questions about how the AC is converted to a higher or lower voltage:

Write two values each shown by the teacher and Harshit

What is the capacitive reactance for a direct current? 

Vijay walked barefoot to replace the fuse wire in kit-kat fitted with the alternating current supply mains for his house. Suddenly he screamed and fall to the floor. His son Amit heard the cries and rushed to the place with his shoes on. He took a wooden baton and used it to switch off the main supply. Answer the following questions on the basis of the above paragraph: What is the voltage and frequency of mains supply in India? 

Vijay walked barefoot to replace the fuse wire in kit-kat fitted with the alternating current supply mains for his house. Suddenly he screamed and fell on the floor. His son Amit heard the cries and crashed to the place with shoes on. He took a wooden baton and used it to switch off the main supply. Answer the following questions on the basis of the above paragraph: These days most of the electrical devices we use require A.C. voltage. Why? 

Vijay walked barefoot to replace the fuse wire in kit-kat fitted with the alternating current supply mains for his house. Suddenly he screamed and fell on the floor. His son Amit heard the cries and crashed to the place with shoes on. He took a wooden baton and used it to switch off the mains supply. Answer the following questions on the basis of above paragraph : Write the values displayed by Amit (any two).