Learn and practice General Knowledge questions and answers on Physics with very easy and understandable explanations. GK questions are very helpful. JEE Physics Syllabus Physics Syllabus Physics JEE Syllabus Physics and measurements Kinematics Laws of motion Work, energy and power Rotational motion Gravitation Properties of solids and liquids Thermodynamics Kinetics theory of gases Oscillations and […]
01. The metal detectors installed at airports and other places for security purpose are based on the principle of ________. A. potential difference B. electromagnetic difference C. electromagnetic induction D. potential energy Answer Option : C 02. Name two main parts of an AC generator. A. stator B. rotor C. None of these D. Both
11. If the magnitude of the resultant force of two forces is lesser than the magnitude of the larger force, then A. The two forces are perpendicular to each other B. They two forces in opposite direction C. The forces are different in magnitude and direction D. The forces posses small magnitude Answer Option :
21. If a current I given by I0sin(ωt−π2) flows across an AC circuit with potential E=E0sinωt, then what is the power consumption in the circuit? A. P= E0Io/2 B. P= √2E0I0 C. P= E0I0/√2 D. P=0 Answer Option : D 22. What is the frequency of a 5μF capacitor that has a reactance of 1000
31. Charged particle ‘q’ moving through a magnetic field with velocity V will have zero magnetic force when the angle is A. 0 B. 90 C. 180 D. Both a and b Answer Option : D 32. If a coil carrying current is placed in uniform magnetic field, then A. emf is produced B. Torque
41. Why is copper a preferred choice in making electrical wires? A. Copper is a good conductor of electricity B. Poor conductor of electricity C. insulator D. superconductor Answer Option : A 42. Conductors are materials that allow A. Allow the flow of heat B. Does not allow heat to flow C. Allows cold to
51. Which of the following statements is true for a dielectric? A. Dielectrics are superconductors at high temperature B. Dielectrics are superconductors at low temperature C. The cannot become superconductors D. They have very less breakdown voltage Answer Option : B 52. The dielectric constant cannot be _____. A. Infinity B. 5 C. 6 D.
61. Cyclotron can be used in _______. A. Particle therapy to treat cancer B. source of high energy beam for a nuclear physics experiment C. Produced short-lived positron -emitting isotopes for PET imaging D. All of the above Answer Option : D 62. A Cyclotron can accelerate _______. A. β particles B. α particles C.
71. Find the dielectric constant for material with electric susceptibility of 5. A. 4 B. 6 C. 7 D. 3 Answer Option : B 72. The logic behind NOR gate is that it gives A. High output when both the inputs are low B. Low output when both the inputs are low C. High output
81. The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is _______. A. 20 B. 125 C. 200 D. 75 Answer Option : B 82. A transmission line has a voltage of 24 V and a conduction current of 1.2 A. What will its receiving impedance? A. 25.2
91. Which of the following statement is true if a body moves in a semicircular track whose radius is R. A. 2R is the displacement of the body B. πR is the distance travelled by the body C. Both (a) and (b) are correct D. None of the above. Answer Option : C 92. What
