Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Optics

The power of a lens of focal length 10 cm is

1

0.1 dioptre

2

1 dioptre

3

10 dioptre

4

More than one of the above

5

None of the above

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