Science Notes

MAGNET MCQ (GOVT JOBS) MAGNET   An item or substance that generates a magnetic field is called a magnet. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that attracts or repels other magnetic materials, such as iron. Magnets have two poles, typically referred to as the north (N) and south (S) poles.  Magnets can be naturally occurring, like lodestone, or they can be manufactured. They come in various types, including: 1. ** Permanent Magnets **:Over time, these hold onto their magnetic qualities. Neodymium, samarium-cobalt, and ferrite are typical materials.  2. ** Temporary Magnets* *: When placed in a strong magnetic field, these behave like permanent magnets; but, when the field is withdrawn, they become less magnetic. 3. ** Electromagnets **: These are created by running an electric current through a coil of wire, often wrapped around a core made of a magnetic material like iron. The magnetic field van...

Mathematics part 1 Here are **ten** math questions along with their answers: 1 .**50 times 8 is equal to:**    - A) 80    - B) 400    - C) 800    - D) 4000    - **Answer: B** 2. **110 divided by 10 is:**    - A) 11    - B) 10    - C) 5    - D) None of these    - **Answer: A** 3. **20 + (90 ÷ 2) is equal to:**    - A) 50    - B) 55    - C) 65    - D) 60    - **Answer: C** 4. **Find the missing terms in the multiple of 3: 3, 6, 9, __, 15**    - A) 10    - B) 11    - C) 12    - D) 13    - **Answer: C** 5 **Solve 24 ÷ 8 + 2.**    - A) 5    - B) 6    - C) 8    - D) 12    - **Answer: A** 6. **Solve: 300 – (150 × 2)**    - A) 150    - B) 100    - C) 50    - D) 0    - **Answer: D** 7. **The product o...

Electron (All Govt Jobs MCQ) ELECTRON  A subatomic particle having a negative electric charge is called an electron.It is one of the fundamental constituents of matter, primarily found in the electron cloud surrounding the nucleus of an atom. Electrons are much lighter than protons and neutrons, with a mass approximately 1/1836 that of a proton. In atoms, electrons occupy discrete energy levels or orbitals, and their arrangements determine the chemical properties of elements. Electrons can also exist as free particles, and their behavior is described by quantum mechanics, exhibiting both particle-like and wave-like properties. Sure, let's dive deeper into the details about electrons: 1. Basic Properties :    - ** Charge **: An electron carries a fundamental unit of negative charge, denoted as \( -1e \), where \( e \) is the elementary charge (approximately \( -1.602 \times 10^{-19} \) coulombs).    - ** Mass **: The mass of an electron is approximately...