PHYSICS MAM JKC

LDR Take 6 different reading for resistance ( R ) against a distance (d) Draw the conclusion Light dependent resistor Aim: to study the effect of intensity of light dependant resistor ( L.D.R.) Apparatus : L.D.R. , filament lamp (16 V , 3W) meter scale, D.C. Power supply , Digital multimeter  (DMM) Result: The intensity of light is inversely proportional to the square of distance.

  Aim: To determine refractive index of Glass by total internal reflection. Apparatus: glass slab, plane white paper, laser pointer ,geometrical instrument box. Result Value of refractive index n = 1.33 MCQ 1. Total internal reflection happens when light travels from: A. Air to glass B. Glass to air C. Vacuum to air D. Water to glass Answer: B 2. Total internal reflection occurs only when angle of incidence is: A. Less than critical angle B. Equal to critical angle C. Greater than or equal to critical angle D. Zero Answer: C 3. The critical angle is the angle of incidence for which the angle of refraction is: A. 90° B. 0° C. 45° D. 180° Answer: A 4. The refractive index of glass can be found using: A. n = sin ⁡ c n = \sin c B. n = 1 sin ⁡ c n = \frac{1}{\sin c} ​ C. n = cos ⁡ c n = \cos c D. n = tan ⁡ c n = \tan c Answer: B 5. Which tool provides a narrow straight beam of light? A. Torch B. Candle C. Laser pointer D. Bulb Answer: C 6. A glass slab...

  Melde’s Experiment Aim :- Arrange the tunning fork for parallel position. Take two different reading by changing the tension and keeping the length of String constant. Write your conclusion. Apparatus : Electronic vibrator , a light in extensible string ,pan , Fractional weight box ,etc. Observation :- i. mass per unit length of string = m= 2.03 x10-3 g/cm ii. Vibrating length of string =l =100cm. iii. Mass of empty scale pan= mo= 3 g. Result 1) As tension in the string increases no. of loop on the string decreases

Second’s pendulum Aim : To determine the length of second’s pendulum App: metal sphere (bob) , inextensible string , retort stand, meter scale , stop watch, vernier calliper. Formula :  Observation: Radius of the bob= 0.9cm ,  Period of second’s pendulum Ts= 2 sec. Observations for period oscillation T= period Length of second’s pendulum =  Result : length of second’s pendulum= L s =103.24 cm