physics objective class 12th

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) monovalent Answer ⇒ B…

1. How many electrons are contained in 23892U nucleus ? (A) 92 (B) 146 (C) 238 (D) O Answer ⇒ 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 these Answer ⇒ B 2.…

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 ⇒ C 2. 1 henry is equal to :…

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