Sample Paper Bihar Board Class XII Physics
(Set-1)
1. S. I. unit of flux is
(A) Ohm
(B) Weber
(C) Tesla
(D) None
2.The relation between geometric length (L g) and magnetic length (
Lm) is–
(A) Lm=5/6L g
(B) Lm=6/5L g
(C) Lm=L g
(D) Lm=2L g
3.Reflactic index of glasses and water are3/2 and 4/ 3 respectively for say
of light going to water for glan, the critical only will be
(A) sin-1 8/9
(B) sin-1 9/8
(C) sin-1 3/4
(D) sin-1 2/3
4. The modulation Index in amplitude modulation is–
(A) Always zero
(B) Between 0 & 1
(C) Between 1 & ∞
(D) None of these
5.Air bulbla inside water shines due to?
(A) Reflection
(B) Reflution
(C) T.I.R.
(D) None of these
6. When a dielectric in introduced into the gap of a parallel plate capacitor,
the capacitance of the capacitor :
(A) Decreases
(B) Increases
(C) Remains same
(D) None of these
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