Education 299 Questions Ask question Search Order By: ActiveTagClear Filter 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. 160 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. 120 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 154 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. 129 viewsAditya Bhatt Answered question 27 January 2024EducationPhysics 1 Votes 1 Ans In the given circuit the current I through the battery will be : 148 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. 199 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 : 111 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 : 136 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.) 133 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 : 128 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) 122 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. 126 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 : 132 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. 125 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. 185 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. 124 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 0 Votes 1 Ans Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surfaces of the two spheres? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its flatter portions 130 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 0 Votes 1 Ans Two charges 2 μC and -2 μC are placed at points A and B, 6 cm apart. a. Identify an equipotential surface of the system. b. What is the direction of the electric field at every point on this surface? 124 viewsAditya Bhatt Answered question 26 January 2024EducationPhysics 0 Votes 1 Ans The triple point of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and Fahrenheit scales. 118 viewsAditya Bhatt Answered question 25 January 2024EducationPhysics 1 Votes 1 Ans Name the suitable thermometer to measure the following temperatures a) -800C b) 600C c) 7800C d) 20000C 130 viewsAditya Bhatt Answered question 25 January 2024EducationPhysics « Previous 1 2 … 12 13 14 15 Next »
