Answer:
what this please be clear
Answer: B
It can exist in many alloys, usually with a carbon base
Explanation:
Iron forms many alloys with a carbon base. Steel is an alloy of iron and carbon. There are many different types of steel needed for different applications. Various metals are added to tune the steel to the required properties. For instance, stainless steel contains 10-30% chromium in addition to iron and a low percentage of carbon. Steel remains an extremely versatile alloy used for many different purposes.
Answer: If a car travels 300 km in 3 hours, then it’s speed will will be 100 km/hr. But in practical it depends upon type of car, condition of car, car's maximum speed and also the path in which car is travelling.. Because car can't travel in constant speed of 100 km/hr. So, if car have 120 km/hr as maximum speed than it's minimum speed will be 85–95 km/hr. And so the car travel 300 km in around 5 or 5 and half hours.
Answer:
Part a)

Part b)
in this case the charge on the capacitor will become zero
Part c)

Part d)

Explanation:
As we know that first capacitor is charged with the battery and then it is connected to the inductor
So here we will have



Part a)
now since the total energy of capacitor is converted into the energy of inductor
so by energy conservation we can say

so maximum current is given as



Part b)
When current is maximum then whole energy of capacitor is converted into magnetic energy of inductor
So in this case the charge on the capacitor will become zero
Part c)
Time period of oscillation of charge between the plates and inductor is given as



now capacitor gets discharged first time after 1/4 of total time period

Part d)
Since time period is T and capacitor gets discharged two times in one complete time period of the motion
so first it will discharges in T/4 time
then next T/4 it will get charged again
then next T/4 time it will again discharged
so total time taken

