What is the full form of USB?
Universal Serial Bus
Understanding the Full Form of USB
The question asks for the full form of the widely used acronym USB.
USB is a standard interface used for connecting peripheral devices such as keyboards, mice, printers, digital cameras, and external hard drives to a computer or other host devices. It provides both communication and power supply to these devices.
Let's look at the options provided:
- Option 1: Unshielded System Board
- Option 2: Universal System Board
- Option 3: Unidentified System Bus
- Option 4: Universal Serial Bus
The correct full form of USB is Universal Serial Bus.
Therefore, Option 4 correctly represents the full form of USB.
What is Universal Serial Bus?
As the name suggests, Universal Serial Bus is a serial communication standard. It was developed in the mid-1990s to standardize the connection of peripherals to personal computers, both to simplify the connections and to improve the usability of existing interfaces. USB replaced many older types of serial and parallel ports.
Key features of USB include:
- It is a universal standard, meaning it can be used across different devices and manufacturers.
- It uses a serial communication method, where data is sent bit by bit over a single wire.
- It allows devices to be connected and disconnected without needing to restart the computer (hot-swapping).
- It provides power to many connected devices.
Understanding the full form helps clarify its purpose as a standard method for connecting various devices in a serial manner.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
Consider the following statements:
1. Distance between the longitudes becomes zero on North Pole and South Pole.
2. Distance between the longitudes is maximum on the Equator.
3. Number of longitudes is more than number of latitudes.
Which of the statements given above is/are correct?
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
