physics objective class 12 bihar board

1. Who undertook the first space walk and in which year ?(A) Leonov, 1965 (B) Neil Armstrong, 1969 (C)…

1. Bonds in a semiconductor :(A) trivalent (B) covalent (C) bivalent (D) monovalentAnswer ⇒ B…

1. How many electrons are contained in 23892U nucleus ?(A) 92 (B) 146 (C) 238 (D) OAnswer ⇒ D…

1. De-Broglie equation states the :(A) dual nature (B) particle nature (C) wave nature (D) none of these…

1. Poisson's bright spot was discovered by:(A) Fresnel (B) Rayleigh (C) Poisson (D)…

1. Which of the following is not a property of light ?(A) It can travel through vacuum (B) It has a finite…

1. The dimensional formula of E is :(A) (B) (C) (D) None of theseAnswer ⇒ B2.…

1. Power factor of an ac circuit is a measure of:(A) virtual power (B) power lost in the circuit (C) mean…

1. Which of the following is not equal to a henry ?Answer ⇒ C2. 1 henry is equal to :…

1. Which of the following has a low value in ferrites ?(A) Conductivity (B) Permeability (C) Magnetic…