11th Physics Past Paper PDF

## 11 वी-Physics **Roll No.:** **Date:** **Time:** 1 Hr. 30 min. **Std.:** 11 वी **Marks:** 25 **सावधान:** परीक्षा संपल्यानंतरही, सदर परीक्षा झालेली प्रश्नपत्रिका कोणत्याही सोशल मिडियावर (जसे Youtube, WhatsApp, Instagram, Facebook, Tiktok, Snapshot, वगैरे) upload किंवा forward किंवा share करणे किं...

## 11 वी-Physics **Roll No.:** **Date:** **Time:** 1 Hr. 30 min. **Std.:** 11 वी **Marks:** 25 **सावधान:** परीक्षा संपल्यानंतरही, सदर परीक्षा झालेली प्रश्नपत्रिका कोणत्याही सोशल मिडियावर (जसे Youtube, WhatsApp, Instagram, Facebook, Tiktok, Snapshot, वगैरे) upload किंवा forward किंवा share करणे किंवा प्राश्निकांच्या लेखी परवानगीशिवाय त्याची कोणत्याही पद्धतीने संपूर्ण अथवा अंशतः कॉपी करणे, हा I.T. कायद्याअंतर्गत गुन्हा आहे. तसे आढळल्यास दोषींना 12 महिन्यापर्यंतचा कारावास होऊ शकतो. (3435aa) ### SECTION - A **Q.1** Select and write the correct answer : (4) i) Dimensional formula for Density is: * A) [L³M'T] * B) [L'MOT²] * C) [L'M'T²] * D) [LM'T²] ii) For two vectors to be equal, they should have the: * A) same magnitude * B) same direction * C) same magnitude and direction * D) same magnitude and opposite direction iii) A unit vector in the direction of the negative of the vector (-i-j+k) is: * A) (+-) * B) (i++) * C) √3 (i + j − k) * D)-(+f-k) iv) An object thrown from a moving bus is an example of : * A) Uniform circular motion * B) Rectilinear motion * C) Projectile motion * D) Motion in one dimension **Q.2** Answer the following: (3) i) Define: Absolute error ii) Classify given quantities in scalar or vector: * a) Momentum * b) Work iii) An object of mass 50 gm moves uniformly along a circular orbit with an angular speed of 5 rad/s. If the linear speed of the particle is 25 m/s, what is the radius of circle? ### SECTION - B **Attempt any Four of the following:** (8) **Q.3** Explain: Personal error **Q.4** Find a vector which is parallel to v = î - 2j has a magnitude 10. **Q.5** State any four characteristics of displacement. **Q.6** The radius of a sphere measured repeatedly yields values 5.63 m, 5.54 m, 5.44 m, 5.40 m and 5.35 m. Determine the most probable value of radius and the mean absolute relative and percentage errors. **Q.7** Distinguish between: Scalar product and Vector product **Q.8** Derive the equation of motion for a projectile. ### SECTION - C **Attempt any Two of the following:** (6) **Q.9** Write down the number of significant figures in the following: * a) 4.877 × 10⁹ * b) 0.003 * c) 26.645 **Q.10** Show that time period of conical pendulum is T = 2π√(L cosθ / g), where L is the length of the string, θ is the angle that string makes with the vertical and 'g' is the acceleration due to gravity. **Q.11** a) Define: Centripetal force * b) Find the dimensions of permittivity of free space (ε₀). ### SECTION - D **Attempt any One of the following:** (4) **Q.12** State and prove parallelogram law of vector addition. **Q.13** a) Explain how the errors of measurement can be reduced. * b) A car travels at a speed of 50 km/hr for 30 min, at 30 km/hr for the next 15 min and then at 70 km/hr for the next 45 min. What is the average speed of the car?