Ask question Search Order By: ActiveCategoryTagClear Filter 2 Votes 1 Ans A smooth circular groove has a smooth vertical wall as shown in figure. A block of mass m moves against the wall with a speed v. Which of the following curves represents the correct relation between the normal reaction on the block by the wall (N) and the speed of the block (v) ? 143 viewsAditya Bhatt Answered question 28 January 2024EducationPhysics 0 Votes 1 Ans A ball is thrown up vertically with a certain velocity so that, it reaches a maximum height h. Find the ratio of the times in which it is at height h/3 while going up and coming down respectively. 151 viewsAditya Bhatt Answered question 28 January 2024EducationPhysics 0 Votes 1 Ans For designing a voltmeter of range 50V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54Ω showing a full-scale deflection for 1 mA as in the figure. 147 viewsAditya Bhatt Answered question 28 January 2024EducationPhysics 1 Votes 1 Ans A single slit of width a is illuminated by a monochromatic light of wavelength 600 nm. The value of ‘a’ for which first minimum appears at θ = 30° on the screen will be 139 viewsAditya Bhatt Answered question 28 January 2024EducationPhysics 1 Votes 1 Ans The fundamental frequency of vibration of a string stretched between two rigid supports is 50 Hz. The mass of the string is 18 g and its linear mass density is 20 g/m. The speed of the transverse waves so produced in the string is_______ m/s. 180 viewsAditya Bhatt Changed status to publish 28 January 2024EducationPhysics 0 Votes 1 Ans A block of mass 10 kg is moving along the x-axis under the action of force F = 5x N. The work done by the force in moving the block from x = 2m to 4m will be _________J. 143 viewsAditya Bhatt Answered question 28 January 2024EducationPhysics 3 Votes 1 Ans Two identical particles each of mass m go round a circle of radius a under the action of their mutual gravitational attraction. The angular speed of each particle will be 176 viewsTanisha Kumari Kumari Posted new comment 27 January 2024EducationPhysics 0 Votes 1 Ans A network of four resistances is connected to a 9V battery, as shown in the figure. The magnitude of the voltage difference between points A and B is__________V. 147 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans In the given circuit the current I through the battery will be : 173 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 3 Votes 1 Ans A 20 cm long metallic rod is rotated with 210 rpm about an axis normal to the rod passing through its one end. The order end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic field of 0.2T parallel to the axis exists everywhere. The emf developed between the center and the ring is ________ mV. 222 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans A wire of length ‘L’ and radius ‘r’ is clamped rigidly at one end. When the other end of the wire is pulled by a force f, its length increases by ‘l’. Another wire of the same material of length ‘2L’ and radius ‘2r’ is pulled by a force ‘2f’. Then the increase in its length will be : 140 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans A 12 V battery connected to a coil of resistance 6Ω through a switch, drives a constant current in the circuit. The switch is opened in 1 ms. The emf induced across the coil is 20 V. The inductance of the coil is : 150 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 2 Votes 1 Ans A body is released from a height equal to the radius (R) of the earth. The velocity of the body when it strikes the surface of the earth will be : (Given g = acceleration due to gravity on the earth.) 149 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans The de Broglie wavelength of an electron having kinetic energy E is λ. If the kinetic energy of the electron becomes E/4, then its de-Broglie wavelength will be : 151 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans The height of transmitting antenna is 180 m and the height of the receiving antenna is 245 m. The maximum distance between them for satisfactory communication in line of sight will be : (given R = 6400 km) 142 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans In a linear simple harmonic motion SHM (A) Restoring force is directly proportional to the displacement. (B) The acceleration and displacement are opposite in direction. (C) The velocity is maximum at the mean position. (D) The acceleration is minimum at extreme points. 144 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans If the charge on a capacitor is increased by 2C, the energy stored in it increases by 21%. The original charge on the capacitor (in coulomb) is : 150 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 1 Votes 1 Ans A cube of side b has a charge q at each of its vertices. Determine the potential and electric field due to this charge array at the center of the cube. 145 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 1 Votes 1 Ans An electrical technician requires a capacitance of 2 μF in a circuit across a potential difference of 1 kV. A large number of 1 μF capacitors are available to him each of which can withstand a potential difference of not more than 400 V. Suggest a possible arrangement that requires the minimum number of capacitors. 207 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 1 Votes 1 Ans An electrical technician requires a capacitance of 2 μF in a circuit across a potential difference of 1 kV. A large number of 1 μF capacitors are available to him each of which can withstand a potential difference of not more than 400 V. Suggest a possible arrangement that requires the minimum number of capacitors. 143 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics « Previous 1 2 … 12 13 14 15 16 Next »
