Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Current Electricity
The velocity of electromagnetic waves in vacuum is:
1
2 × 108 ms-1
2
3 × 108 ms-1
3
2 × 105 ms-1
4
More than of the above
5
None of the above