Bihar Board Physics model paper | kamal biology | professor md wazaifa kamal скачать в хорошем качестве

Bihar Board Physics model paper | kamal biology | professor md wazaifa kamal

Bihar Board Physics model paper | kamal biology | professor md wazaifa kamal This video from Kamal Biology discusses a Bihar Board Physics model paper, focusing on objective questions and aiming for students to achieve high marks. Here's a summary of the key points: IntroductionandPrevious Discussions (1:08-1:22): The speaker welcomes students and mentions having already discussed the first set of objective questions and part of the second set in a previous night class. Importance of Model Papers andPYQs (1:43-2:13):The speaker emphasizesthat solving model papersand previous year's questions (PYQs) can help students achieve over 90% marks inPhysics.They also state that thehighest score inPhysics so far has been 92, and they aim for students to break this record. Subjective Questions and Doubt Clearing (2:37-2:57): The speaker highlights that the subjective questions in this year's model set are challenging and advises students to memorize them. They encourage students to use the comment section for any doubts or questions, promising to create special videos for frequentlyasked questions. Preparation for Class (3:04-3:15): Students are advised to keep a rough sheet and a pen ready and to sit in a quiet place, informing their parents not to disturb them during the class. Discussion ofQuestion 13: Electric Field in a Charged Metallic Sphere (3:16-5:45): The speaker introduces the 13th question, which asks about the electric field when moving from the surface of a charged metallic sphere to its center. The options are: decreases, increases, remains the same, or zero at all places. Answer to Question 13 (6:09-7:54): The speaker explains that for a charged metallic sphere, the electric field inside the sphere (at the center) is zero (Option D). Discussion of Question 14: Which Physical Quantity is a Vector? (8:36-10:00): The 14th question asks to identify which of the given physical quantities is a vector. The options are: electric flux, electric potential, electric potential energy, and electric intensity. Explanation of Physical Quantities and Vectors/Scalars (11:23-12:08): The speaker explains that physical quantities are measurable, divided into fundamental and derived. They define vectors as quantities with magnitude, direction, and those that follow vector laws, unlike scalars. Answer to Question 14 (12:08-12:21): The correct answer is Electric Field Intensity (Option D), while electric flux, electric potential, and electric potential energy are scalars. Dimensional Formula of Electric Field Intensity (12:40-13:02): The speaker briefly revisits the dimensional formula for electric field intensity (MLT^-3A^-1). Discussion of Question 15: Electrostatic Energy of a System with Two Electric Dipoles (14:17-15:57): The 15th question concerns the electrostatic energy of a system made by two electric dipoles kept at a distance 'r'. It asks about the proportionality of this energy to 'r'. The options include r², r⁻³, r⁴, and none of these. Answer to Question 15 (19:03-19:38): The correct answer is r⁻³ (Option B). Electric Dipole Moment (19:44-20:00): The speaker reminds students about the electric dipole moment (p = q * 2a) and its importance. Discussion of Question 16: SI Unit of Electric Field Intensity (20:16-21:10): The speaker orally asks about the SI unit of electric field intensity. Answer to Question 16 (20:54-21:10): The SI unit is Newton per Coulomb (N/C). Discussion of Coulomb's Law and Constants (21:52-22:47): The speaker briefly reviews Coulomb's Law, the proportionality constant 1/(4πε₀) which has a value of 9 × 10⁹, and the value of ε₀ (8.85 × 10⁻¹²). Discussion of Question 19: Current Used in Electroplating (23:07-24:06): The 19th question asks what type of current is used in electroplating: DC, AC, both, or none. Answer to Question 19 (24:30-24:54): The correct answer is DC Current (Option A). Discussion of Question 20: Correct Formula for Current Density (25:42-26:23): The 20th question asks for the correct formula for current density (J). The options are J = I/A, J = IA, and others. Discussion of Question 21: Unit of Ampere Hour (28:48-29:50): The 21st question asks what Ampere Hour is a unit of: Power, Charge, Energy, or Potential Difference. Answer to Question 21 (30:01-31:11): The correct answer is Charge (Option B). Relation between Kilowatt-hour and Joule (31:41-32:12): The speaker mentions that 1 Kilowatt-hour is equal to 3.6 × 10⁶ Joules. Discussion of Question 23: Resistance of Ammeter (42:14-43:00): The 23rd question asks about the resistance of an ammeter: small, large, very small. Answer to Question 23 (43:29-43:42): The correct answer is Very Small (Option C). Discussion of Question 24: Direction of Magnetic Dipole Moment (44:44-45:48): The 24th question asks about the direction of magnetic dipole moment, which is a vector quantity. The options include Short to North Pole, N to E, E to W, and West to East. Answer to Question 24 (47:22-48:00): The correct answer is South Pole to