29. A parallel plate capacitor of capacitance \( 40\,\mu\text{F} \) is connected to a \( 100\,\text{V} \) power supply. Now the intermediate space between the plates is completely filled with a dielectric material of dielectric constant \( K = 2 \). Due to the introduction of the dielectric material, the extra charge and the change …
JEE Main 2025 Dated 22nd Jan Shift 1 Question Paper & Solution Read More »
Q1. The National Anthem was written by (a) Rabindranath Tagore (b) Bankim Chandra Chatterji (c) Mohammed Iqbal (d) None of the above (UPSC Prelims 1985) Answer: (a) Rabindranath Tagore Explanation: Rabindranath Tagore composed the National Anthem of India, “Jana Gana Mana.” It was first sung in 1911 and officially adopted by the Constituent Assembly in …
Q1. The Seventh Schedule of the Indian Constitution contains (a) States and Union Territories (b) Salaries of the President, Governors of States, Judges of Supreme Court, etc. (c) Union List, State List and Concurrent List (d) Allocation of seats in the Rajya Sabha (UPSC Prelims 1985) Answer: (c) Union List, State List and Concurrent List …
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Q1. The Soviet Socialist Revolution on October is celebrated every year on November 7 because (a) Lenin’s birthday falls on this date (b) Russia’s victory over Germany coincides with this date (c) The Provisional Government formed after the collapse of Czarist Government was overthrown on this day in 1917 (d) None of the above (UPSC …
Q1. Which of the following parks/sanctuaries is/are correctly matched with their location : I : Ghana – Assam II : Gir – Rajasthan III : Manas – Assam IV : Corbett – M.P. V : Periyar – Kerala VI : Dudwa – U.P. (a) I only (b) All (c) V and VI (d) III, V …
Q1. Who among the following Governors-General introduced the Dual System of Government ? (a) Lord Wellesley (b) Lord Canning (c) Lord Clive (d) Lord Rippon (UPSC Prelims 1985) Answer: (c) Lord Clive Explanation: Lord Clive introduced the Dual System of Government in Bengal after the Battle of Buxar (1764). This system separated revenue collection (by …
Q1. Study the frequency of the following electromagnetic radiations and select the correct relationship (‘>’ implies greater than): I. : Infra-red II. : Microwave III. : Ultra-violet (a) I > II > III (b) III > I > II (c) III > II > I (d) II > III > I (UPSC Prelims 1985) Answer: …
Q1. Which of the following Acts gave representation to Indians for the first time in legislatures ? (a) The Indian Councils Act. 1909 (b) The Indian Councils Act, 1919 (c) The Government of India Act, 1935 (d) None of the above (UPSC Prelims 1985) Answer: (a) The Indian Councils Act. 1909 Explanation: The Indian Councils …
The photoelectric effect is one of the most revolutionary phenomena in physics that shattered classical wave theory and laid the foundation for quantum mechanics. Discovered by Heinrich Hertz in 1887 and explained by Albert Einstein in 1905 (for which he won the Nobel Prize), this effect demonstrates the particle nature of light. What is the …
Q. The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV, respectively. If light of wavelength 550 nm is incident on the surfaces of these two metals, the photoelectric effect will be observed in which of the following cases? Lithium only Neither cesium nor lithium Both cesium and lithium …