LETXY

SECTION — A(1 Mark Questions) 1. A biconcave lens of power P vertically splits into two identical plano concave parts. The power of each part will be a) 2Pb) P/2c) P d) P/√2 2. The power factor of a series LCR circuit at resonance will bea) 1b) 0c) 1/2d) 1/√2…

SECTION — A(1 Mark Questions) 1. The wavelength and intensity of light emitted by a LED depend upon a) forward bias and energy gap of the semiconductorb) energy gap of the semiconductor and reverse biasc) energy gap onlyd) forward bias only 2. The graph showing the correct variation of linear…

SECTION — A(1 Mark Questions) 1. The relationship between Brewster angle 'θ'and the speed of light 'v' in the denser medium is —a) v tan θ = cb) c tan θ = vc) v sin θ = cd) c sin θ = v ⭐ 2. Photo diodes are used to…

SECTION — A 1. Distinguished between unpolarized and linearly polarised light. (1) 2. Define the term "threshold frequency", in the context of photoelectric emission. (1)ORDefine the term "intensity" in the photon picture of electromagnetic radiation. 3. How is the drift velocity in a conductor affected with the rise in temperature?…

SECTION — A 1. Define the term "threshold frequency", in context of photoelectric emission. (1)ORDefine the term "intensity" in photon picture of electromagnetic radiation. 2. When unpolarised light is incident on the interface separating the rarer medium and the denser medium, Brewster angle is found to be 60 °. Determine…

SECTION — A 1. Draw the pattern of electric field lines, when a point charge - Q is kept near an uncharged conducting plate. (1) ⭐ 2. How does the mobility of electrons in a conductor change, if the potential difference applied across the conductor is doubled, keeping the length…