RRB Group D Exam 2022 Physics Most Important MCQ

-2D शक्ति के लेंस की फोकल लंबाई ज्ञात कीजिए।

[{"selector":"#anim-dfd0c841-7df7-4709-8c4c-33a798244150","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-7f74d876-a966-405e-877b-321fdeb46a6c","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-821b5c6c-1f72-4ba2-b98e-52637cbbec0f","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1ebf3919-29ee-4535-bb69-8dbd9dfc16d8","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-f2003a77-cbb0-411a-8e47-15b5404616de","keyframes":{"transform":["translate3d(-121.73913%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-312c5a4c-da52-48af-8984-3f923e642336","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-acf017fe-63d5-42fb-b8dd-ff0521fbbb60","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-8b6095c1-abb4-42e8-8fbd-a93e912c5f2d","keyframes":{"opacity":[0,1]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-bdd375aa-7eb4-4668-8baf-0416ac3fd1c2","keyframes":{"transform":["translate3d(179.03226%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

एक गोलीय दर्पण और एक गोलाकार लेस में प्रत्येक की फोकल लंबाई 15 सेमी है। दर्पण और लेस कौनसा होने की संभावना है

[{"selector":"#anim-998b5368-0bf1-411f-90c5-7285d56be456","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8374181a-23c6-44c8-9a5f-c59bf5417088","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d615e4b8-396f-4bab-83b4-6dca997af56a","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-451424b5-a7fa-4f08-9af0-764f6c856127","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-eda77c43-6c63-45a7-a3f7-6e8555a4a9fa","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-43d6c978-c91e-4472-b10e-612c74a132df","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3254baa7-eebe-4fb3-9de0-ec58f690a0bc","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-fe426ca6-2416-4fb0-8689-34df0b570b52","keyframes":{"opacity":[0,1]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d4653e20-aaca-490c-a316-230dcff43b32","keyframes":{"transform":["translate3d(138.65547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

20 सेमी फोकल लंबाई के अवतल लेंस की शक्ति क्या है?

[{"selector":"#anim-e0084215-6165-44a9-b7fb-3ae260fc5a3d","keyframes":{"transform":["translate3d(-99.51923%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e6ecd5c6-39f0-4b68-abbc-a8566f96176a","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e960b028-25f4-4d9a-a936-1f4ca1c419ff","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-c5511577-229a-47ce-add9-03f75245532c","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-05d322d3-31c7-46c8-a555-44d41fd32069","keyframes":{"transform":["translate3d(-118.56677%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1d4eef81-ee56-4473-a7cd-7b95e4eb1e18","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0169da76-e8ad-4ae3-9a3f-528b4ca04f13","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-718bddb6-e990-4590-a806-45435b830036","keyframes":{"opacity":[0,1]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-fec934e0-db88-40b9-9ff8-219e301bdb71","keyframes":{"transform":["translate3d(147.31182%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

आवर्धक लेंस से AB वस्तु 9 सेमी की दूरी पर है और इसका प्रतिबिंब लैस से 36 सेमी पर बनता है। लेंस का ऑवर्धन है।

[{"selector":"#anim-17fa53c7-2c49-4d67-80ac-f5e4899392e7","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-950466e1-a2d9-4a9f-9c82-b9dd57743f8b","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-467548ad-bc6b-4648-b603-a46f42ff3265","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-66615911-7aed-40f7-a714-b95f3a4b188c","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-b6dab860-15a8-426a-ae25-c8f93818bc97","keyframes":{"transform":["translate3d(-117.94021%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-68e342c4-b1e0-4a43-a0a0-d22d494b96a4","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f03b5bf6-39a8-42ed-bd17-dd0f7cfbc273","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-6ba1d187-e1fc-49a9-8616-d3c949e64a47","keyframes":{"opacity":[0,1]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7f1a5b5e-2054-4c3c-aa27-2668e2d49a94","keyframes":{"transform":["translate3d(90.10240%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

निम्नलिखित में से कौन सा लेंस प्रकाश की किरण को अधिक अपसारित करेगा?

[{"selector":"#anim-6d30e93e-d41e-471c-8d13-1f92bd40fcde","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0c16120a-2710-44af-95f0-cd8a47c454de","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6be61989-c2df-48b8-8d12-bda716123704","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-522b2553-6516-4077-9755-6b4c48d902a0","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-6a0b9a2d-b338-47e9-b1dd-9e8838b9f8dd","keyframes":{"transform":["translate3d(-121.73913%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2ae89eae-5382-4f69-91ab-8fd915571f45","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-97f1bc66-5543-4718-b9ad-ee738deab4e4","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-c565790f-b07c-4bae-ac3c-037f12e99bef","keyframes":{"opacity":[0,1]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-cd63d35a-85fa-40e8-8bd3-30f28a2710af","keyframes":{"transform":["translate3d(152.68818%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":400,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

फोकल लंबाई 12 सेमी का उत्तल लेंस – 1 का आवर्धन उत्पन्न करता है। वस्तु को कहाँ रखा जाना चाहिए;

[{"selector":"#anim-5d32ad51-ce96-4a87-8af5-40984b7c09ed","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ac00c0a2-4014-4018-bdef-bc2c927ce886","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-912d2cf3-fcd4-44c6-a6f3-08f8b884f2ee","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-002e5e68-615e-41e2-b97c-04dc409aef88","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-c9f0b692-1b08-4398-97c0-892d0f5994d3","keyframes":{"transform":["translate3d(-114.92064%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-85ff37a4-86f0-4751-8ad6-df72625f4486","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3a6641b2-6fb9-4c0f-b131-65e3e497c34d","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-628b1be1-a7ff-470a-8efd-7bd267d35c8f","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-092dfc2b-9097-490f-af79-a1186ae50818","keyframes":{"transform":["translate3d(156.98926%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

उत्तल लेंस एक वास्तविक, बिंदु आकार का प्रतिबिंब फोकस पर बनाता है, वस्तु को पर रखा गया है।

[{"selector":"#anim-be938e2c-08a8-4bd2-906e-8b477897e490","keyframes":{"transform":["translate3d(-99.03847%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6677f400-e0f7-404e-b479-27df0a6405bb","keyframes":{"opacity":[0,1]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-252e9223-16ef-478d-a50b-22cfcb86b714","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1400,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-8f310f5c-9007-40b7-9ec6-aef96bb87c27","keyframes":[{"transform":"scale(1)","offset":0},{"transform":"scale(1.07)","offset":0.33},{"transform":"scale(0.993)","offset":0.66},{"transform":"scale(1)","offset":1}],"delay":200,"duration":1200,"easing":"ease-in-out","fill":"both","iterations":1}] [{"selector":"#anim-06030cb1-d792-471c-88d9-58580f72b5be","keyframes":{"transform":["translate3d(-116.06557%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2c62c87b-9915-4aed-9145-50825fd5dbe9","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d7fb97e8-6450-4e5f-bd0d-488cd1c4d268","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}] [{"selector":"#anim-be3dc6c0-eeca-4d0d-92e0-d636cd46c1b2","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-88111515-f246-4643-bd38-2b53eaf07526","keyframes":{"transform":["translate3d(91.79811%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Arrow

-2D शक्ति के लेंस की फोकल लंबाई ज्ञात कीजिए।