Engineering Questions — Physics

Q.41. An insulated wire is wound so that it forms a flat coil with N = 200 turns. The radius of the innermost turn is , and of the outermost turn . If 20 mA current flow in it then the magnetic moment

Q.48. A 5 mg particle carrying a charge of 5π × 10⁻⁹ C is moving with velocity of (3\hat{i}+2\hat{k})×10²m/s in a region having magnetic field B=0.1\hat{k} Wb/m². It moves a distance of a meter along

Q.31. A solid sphere of radius 4 cm and mass 5 kg is rotating (rotation axis is passing through the centre of the sphere) with an angular velocity of 1200 rpm. It is brought to rest in 10 s by applyin

Q.38. A monochromatic source of light operating at 15 kW emits 2.5 × 10²² photons/s. The region of an electromagnetic spectrum to which the emitted electromagnetic radiation belongs to (Take h = 6.6 ×

Q.29. A capacitor C is first charged fully with potential difference of and disconnected from the battery. The charged capacitor is connected across an inductor having inductance L. In t s 25% of the

Q.46. A parallel plate capacitor is having separation between plates 0.885 mm. It has a capacitance of 1 µF when the space between the plates is filled with an insulating material of resistivity 1 × 1

Q.40. A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for this combination of two lenses?

Q.29. Two blocks (P and Q) with respectively masses 2 kg and 1.5 kg are joined by a massless thread. These blocks are mounted on a frictionless pulley which is fixed on the edge of a cube (S), as show

Q.43. A large drum having radius R is spinning around its axis with angular velocity , as shown in figure. The minimum value of so that a body of mass M remains stuck to the inner wall of the drum, t

Q.26. The density of a uniform cylinder is determined by measuring its mass , length and diameter . The measured values of and are , and , respectively. Calculated percentage fractional error in