Electrons
Electrons is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2021, 2024). Below are those real questions with their correct answers and explanations.
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Real questions that test this
खालील विधानें पहा : / Consider the following statements :
(a)अणू हा विद्युतभार दृष्ट्या उदासीन असतो. / An atom is electrically neutral.
(b)केंद्राभोवती फिरणाऱ्या सर्व इलेक्ट्रॉन्सचा ऋण विद्युतभार व केंद्रानावरील ऋण भार समान असतो. / The negative charge on nucleus is equal to the total negative charge of all the orbiting electrons.
An atom is electrically neutral because the positive charge on its nucleus equals the total negative charge of all orbiting electrons, making statement (a) correct and statement (b) incorrect since the nuclear charge is positive, not negative.
खालीलपैकी कोणते वाक्य चुकीचे आहे ? / Which of the following sentence is wrong ?
(a)अणुकेंद्र हे प्रोटॉन व न्यूट्रॉनने बनलेले असते. / Atomic nucleus is made up of protons and neutrons.
(b)प्रोटॉनवर धनभार असतो. / Proton has a positive charge.
(c)इलेक्ट्रॉनवर ऋणभार असतो. / Electron has a negative charge.
(d)न्यूट्रॉनवर धनभार असतो. / Neutron has a positive charge.
Neutrons are neutral subatomic particles with no electrical charge, so statement (IV) claiming neutrons have a positive charge is factually incorrect.