Education 299 Questions Ask question Search Order By: ActiveTagClear Filter 1 Votes 1 Ans If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is 119 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans In half wave rectification if the input frequency is 60 Hz, then the output frequency would be (1) Zero (2) 30 Hz (3) 60 Hz (4) 120 Hz 122 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 0 Votes 1 Ans A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball (v) as a function of time (t) is (1) A (2) B (3) C (4) D 120 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 0 Votes 1 Ans An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among 1, 2, 3 and 4 is (1) 1 (2) 2 (3) 3 (4) 4 140 viewsAditya Bhatt Edited answer 11 February 2024EducationPhysics 0 Votes 1 Ans The angular speed of a flywheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in is (1) 2π (2) 4π (3) 12π (4) 104π 133 viewsAditya Bhatt Edited answer 11 February 2024EducationPhysics 1 Votes 1 Ans A biconvex lens has radii of curvature 20 cm each. If the refractive index of the material of the lens is 1.5 the power of the lens is (1) +2 D (2) +20 D (3) +5 D (4) Infinity 130 viewsAditya Bhatt Edited answer 11 February 2024EducationPhysics 1 Votes 1 Ans The graph which shows the variation of the de Broglie wavelength (λ) of a particle and its associated momentum (p) is 142 viewsAditya Bhatt Edited answer 11 February 2024EducationPhysics 0 Votes 1 Ans As the temperature increases the electrical resistance (1) Increases for both conductors and semiconductors (2) Decreases for both conductors and semiconductors (3) Increases for conductors but decreases for semiconductors (4) Decreases for conductors but increases for semiconductors 133 viewsAditya Bhatt Edited answer 11 February 2024EducationPhysics 1 Votes 1 Ans In the given circuits (a) (b) and (c) the potential drop across the two PN junctions are equal in 111 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans For the following logic circuit, the truth table is 128 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans A wire carrying a current I along the positive x axis has length L. It is kept in a magnetic field The magnitude of the magnetic force acting on the wire is 315 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans The resistance of platinum wire at 0 C is 2 Ω and 6.8 Ω at 80°C. The temperature coefficient of resistance of the wire is 132 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans A very long conducting wire is bent in a semi-circular shape from A to B as shown in figure. The magnetic field at point P for steady current configuration is given by 251 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans 10 resistors, each of resistance R are connected in series to a battery of emf E and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased n times. The value of n is (1) 10 (2) 100 (3) 1 (4) 1000 163 viewsAditya Bhatt Answered question 11 February 2024EducationPhysics 1 Votes 1 Ans Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is 0.15 156 viewsAditya Bhatt Answered question 10 February 2024EducationPhysics 1 Votes 1 Ans A horizontal bridge is built across a river A student standing on the bridge throws a small ball vertically upwards with a velocity 4 m/s. The ball strikes the water surface after 4 s. The height of bridge above water surface is 158 viewsAditya Bhatt Answered question 10 February 2024EducationPhysics 1 Votes 1 Ans In the figure shown here what is the equivalent focal length of the combination of lenses (Assume that all layers are thin)? 230 viewsAditya Bhatt Answered question 10 February 2024EducationPhysics 1 Votes 1 Ans The x-t graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at t = 2 s is 135 viewsAditya Bhatt Answered question 10 February 2024EducationPhysics 1 Votes 1 Ans The radius of innermost orbit of hydrogen atom is . What is the radius of third allowed orbit of hydrogen atom? (1) 0.53 Å (2) 1.06 Å (3) 1.59 Å (4) 4.77 Å 111 viewsAditya Bhatt Answered question 10 February 2024EducationPhysics 1 Votes 1 Ans A bullet from a gun is fired on a rectangular wooden block with velocity u. When a bullet travels 24 cm through the block along its length horizontally, the velocity of the bullet becomes u/3. Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is (1) 27 cm (2) 24 cm (3) 28 cm (4) 30 cm 278 viewsAditya Bhatt Answered question 8 February 2024EducationPhysics « Previous 1 2 … 7 8 9 10 11 … 14 15 Next »
