Exams & Certification

First term of an infinite g.p. is 4 and sum is 8. Find Common ratio. The Correct Answer and Explanation is: To find the common ratio of an infinite geometric progression (G.P.), we can use the formula for the sum of an infinite G.P.: S∞=a1−rS_{\infty} = \frac{a}{1 – r}S∞​=1−ra​ Where: We are given the following […]

How does induction happen at the single phase induction motor rotor? Due to rotating magnetic field. Due to rotating rotor. Due to ac current provided to stator windings. Due to dc current provided to rotor windings. The correct answer and explanation is: The correct answer is: Due to the rotating magnetic field. In a single-phase

A cube at 112 °C radiates heat at a rate of 92 J/s. If its surface temperature is increased to 196 °C, the rate at which it will now radiate is closest to The Correct Answer and Explanation is: The rate at which an object radiates heat is governed by the Stefan-Boltzmann law, which states:P=σAT4P

can be defined as microorganisms that are capable of causing diseases. A Pathogens B Plasmids C Microbes D Virulence factors The correct answer and explanation is: The correct answer is A. Pathogens. Explanation: Pathogens are microorganisms, including bacteria, viruses, fungi, and parasites, that are capable of causing diseases in their host organisms. These disease-causing organisms

Calculate the density of silicon in cm³ (given that the cube edge has a length of 543 pm). Density: 2.3272 g/cm³ Correct: Si atoms per cell: 28.09 mol 3.732 B/unit cell 6.0221 x 10^28 atoms Volume of unit cell: (543.1 cm)³ 602 x 10^23 atoms 3.732 x 1.602 Density: 329 B/cm³ Estimate the radius of

What is the approximate value of the H-C-H bond angles in methane, CH4? Select one: a. 180° b. 109° c. 120° d. 90° The correct answer and explanation is: The correct answer is b. 109°. Explanation: Methane (CH4) consists of a central carbon atom bonded to four hydrogen atoms. The geometry of methane is based

Which of the following would be best to serve first after T & A surgery? a. Ice cream. b. Cherry Popsicle. c. Low fat milk. d. Lime Popsicle. The correct answer and explanation is: The correct answer is b. Cherry Popsicle. After a tonsillectomy and adenoidectomy (T & A) surgery, the priority is to offer

What is the expected charge on an ion of nitrogen? A. -3 B. +3 C. +8 D. +5 The Correct Answer and Explanation is: The correct answer is A. -3. Explanation: To determine the expected charge of a nitrogen ion, we need to consider the electron configuration of nitrogen and its position on the periodic

Which is a means of denaturing a protein? A) change in temperature B) changes in pH C) use of detergents or soaps D) all of these choices The correct answer and explanation is: The correct answer is D) all of these choices. Denaturing a protein refers to the process where a protein loses its three-dimensional

Calculate the molar mass of Cu2O and the % by weight of Cu in Cu2O. The Correct Answer and Explanation is: To calculate the molar mass of Cu2O and the percentage by weight of Cu in Cu2O, let’s break it down step by step: Step 1: Determine the Atomic Masses The atomic mass of copper