Resistance of galvanometer by half deflection method
Experiment to determine galvanometer resistance using the half deflection method in the apparatus theory and the viva half deflection method. Apparatus A low-resistance galvanometer, a cell, two resistance boxes, two one-way plug keys, connecting wires, and sandpaper are required. These items are used to perform the Resistance of a galvanometer by half half-deflection method. […]
Measure a DC and AC voltage by a cathode ray oscilloscope.
Measure DC and AC voltage using a cathode ray oscilloscope; explain sensitivity, procedure, precautions, and calculation of RMS and peak values. Apparatus Cathode ray oscilloscope, DC voltmeter, AC voltmeter, step-down transformer, battery, rheostat, key, and connecting wires. Theory The voltage required to produce one small division of light spot deflection on the oscilloscope screen […]
Study the characteristics of a Geiger-Muller (GM) tube.
Study of Geiger-Muller tube characteristics using a radioactive source, scaler, and voltage variation to measure count rate, threshold, and Geiger plateau. Apparatus Geiger-Muller Tube (Mullard MX 180) Tube holder and connecting leads Universal castle Co-60 radioactive source with lifting tools Time scaler and stopwatch Theory The Geiger-Muller tube is a discharge tube containing a cylindrical […]
Canada has banned the messaging app WeChat
Canada has banned the Chinese app WeChat from government devices. Officials say the app could collect data and threaten privacy. WeChat is one of the most used apps in the world. People in China, Southeast Asia, and Chinese communities everywhere use it daily. The ban starts now. Treasury Board President Anita Anand said the government […]
Atomic weight determination of covalent metal M
Experiment to determine the atomic weight of covalent metal M using acid-base titration of its hydroxide with 0.1M HCl and phenolphthalein indicator. Principle MOH is a base. Therefore, neutralize it by titrating with standard HCl: MOH+HCl→MCl+H2Otext{MOH} + text{HCl} rightarrow text{MCl} + text{H}_2text{O}MOH+HCl→MCl+H2O The mole ratio is 1:1. Use 0.1 M HCl as the standard […]
Photoelectric current variation with light intensity
Experiment to study the variation of photoelectric current with light intensity using a photocell, galvanometer, and lamp, verifying the inverse square law of l, light. Apparatus Photocell, sensitive galvanometer, battery, rheostat, key, electric bulb (preferably a point-type lamp), suitable case for the bulb and photocell, and connecting wires. Theory Light intensity is the amount […]
AI may increase risk of cyberattacks, report says.
A new report by the British government warns that Artificial Intelligence (AI) could increase the risk of cyberattacks.According to a British news agency, AI may raise the threat of digital crimes and reduce trust in online information by 2025. The report also states that AI technology might help terrorist groups plan biological or chemical […]
Drone light show in China sets a world record.
China set a world record in Chongqing with 11,787 drones creating stunning night sky designs, flowers, cityscapes, and messages in a light show. Beijing (Web Desk): China, known for its grand drone light shows, has achieved another milestone. A city in China has set a Guinness World Record for the largest drone display. […]
Banks set a Rs 100m withdrawal limit to curb tax evasion.
FBR and Banks Agree to Share Data to Tackle Tax Evasion New Data-Sharing Framework Introduced Karachi: In a major step toward tackling tax evasion, the Federal Board of Revenue (FBR) and commercial banks have agreed to launch a data-sharing system. This system will help track large transactions and improve tax compliance. Under this plan, the […]
Find the unknown weight using the vector addition method.
Experiment to find unknown weight using vector addition of forces with Gravesand’s apparatus, applying equilibrium conditions and rectangular components. Apparatus Gravesand’s apparatus, two slotted weights with hangers, a plane mirror strip, thread, drawing pins, plain paper, a protractor, and a body of unknown weight. Concepts to Remember Vectors Vectors are physical quantities that have both […]