Author: admin

46. Which of the following statements is/are CORRECT regarding self-inductance of a long solenoid having cross sectional area (𝐴), length (𝑙) and having 𝑛 turns per unit length filled with […]

45. Match the entries in Group I (Mechanical system) with analogous quantities in Group II (Electrical system) Group I                        […]

44. A 30 µF capacitor is connected to a 240 V, 50 Hz source. If the frequency of the source is changed from 50 Hz to 200 Hz, the capacitive […]

43. Which one of the following shows the CORRECT relationship among velocity of light in a medium (𝑣), permittivity of medium (𝜀) and magnetic permeability of medium (𝜇)? Correct Relationship […]

42. Nucleus of a radioactive material can undergo beta decay with half life of 4 minutes. Suppose beta decay starts with 4096 nuclei at 𝑡 = 0, the number of […]

41. An infinitely long solenoid of radius r and number of turns per unit length n carries a steady current I. The ratio of the magnetic fields at a point […]

40. Two identical, infinite conducting plates are kept parallel to each other and are separated by a distance d. The uniform charge densities on the n plates are +σ and -σ. […]

39. A metallic wire of electrical resistance 40 Ω is bent in the form of a square loop. The resistance between any two diagonally opposite corners is       Ω. Resistance […]

38. The refractive index of a liquid relative to air is 1.5. Calculate the ratio of the real depth to the apparent depth when the liquid is taken in a […]

37. Which of the following statement(s) is/are true? (A) In intrinsic semiconductors, the number of electrons is equal to the number of holes at any temperature (B) An intrinsic semiconductor […]