Mobile speed really boost after closing background apps ?

Which of the following statement(s) is/are correct? I Conductivity arises from mobile charge carriers. II In metals, these mobile charge carriers are electrons with fixed positive ions in background.

When the switch S is closed at t=0 , identify the correct statement just after closing the switch as shown in figure

Refer to Fig. 7.49 . At t = 0 , the switch is closed . Just after closing the switch, find the current through the 5 Omega resistor.

There are energy bands in a solid. Do we have really continous evergy variation in a band or do we have very closely spaced but still discrete energy level ?

In the circuit shown in figure-3.238, find the current in 6Omega resistance just after closing the switch S.

With reference to Rail Kumbh Seva Mobile App', consider the following statements I. The app was launched by UP Chief Minister Aditya Nath Yogi to help the attendees of the Kumbh Mela in Prayagraj city in navigation. II. The users of the app can access devotional songs and hymns 24 X 7 through the help of Kumbh Radio. Which of the statement given above is/are correct?

Assertion In the figure, just after closing the switch the potential drop across inductor is maximum. Reason The rate of change of current just after closing the switch is maximum.