Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Physics Current Electricity
Batteries used in mobile and smartphones are made up of______.
1
Dry cell
2
Mercury cell
3
Lithium-ion battery
4
More than one of the above
5
None of the above