FreeNotes
Answer: A telephone is a wired device that uses a landline network for communication, while a cellular phone is wireless, using mobile networks and radio signals to connect. The main difference is that a telephone (landline) is connected to a physical wired network, while a cellular phone (mobile phone) uses wireless signals to connect to … Read more
Hard disks use advanced magnetic storage technology with multiple platters, allowing them to store significantly more data than floppy disks or DVDs, which have limited physical space for data storage. The storage capacity of a hard disk is greater because it uses more advanced technology, such as higher-density platters and faster data access, compared to … Read more
Optical fiber has higher bandwidth, transmits data at the speed of light, has minimal signal loss, and is immune to electromagnetic interference, making it superior to electric wires. Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through air. What is the difference … Read more
RAM (Random Access Memory): Temporary, volatile memory used for processing tasks. Data is lost when the power is off. ROM (Read-Only Memory): Permanent, non-volatile memory that stores essential instructions (e.g., BIOS). Data is not lost when the power is off. Related Questions: What is the difference between data and information? Briefly explain the process of … Read more
Primary memory (RAM, cache memory) is fast and temporary, used for processing tasks. Secondary memory (hard drives, SSDs) is slower but permanent, used for storing data. We need both because primary memory ensures fast processing, while secondary memory provides long-term data storage. Related Questions: What is the difference between data and information? Briefly explain the … Read more
In radio communication, information is first converted into electrical signals, which are then modulated onto radio waves. These waves travel through the air and are received by an antenna, which converts them back into electrical signals for processing. Related Questions: What is the difference between data and information? What is the difference between primary and … Read more
Data consists of raw facts and figures without any meaningful context, whereas information is processed and organized data that provides meaningful insights. Related Questions: Physics 10 MCQ Simple harmonic motion and waves Simple harmonic motion and waves-NFE Give an example of vibratory motion which is not simple harmonic motion. Give a reason for your selection. … Read more
Statements: 1. A 12V potential difference is applied across a copper conductor with a resistance of 6 kilo-ohm. Find: The current passing through it. The charge passing through any cross-sectional area in one hour. 2. During lightning, a current of 15,000A is established when 40C charge passes through a tree due to a potential difference … Read more
Household electricity can present several hazards, including: Electric Shock: When a person comes into direct contact with an electrical source, it can lead to an electric shock, which can cause burns, muscle spasms, or even be fatal in severe cases. Electrical Fires: Faulty wiring, overloading circuits, or electrical appliances with malfunctioning components can overheat and … Read more
Short Circuit and Open Circuit: Short Circuit: A short circuit occurs when the live wire (also known as the hot wire) comes into direct contact with the neutral wire, or any other conducting material, bypassing the load (such as an appliance or light). This leads to a low-resistance path for the current to flow, which … Read more