Question

What is the use of a speedometer in a vehicle?
A. Displays mileage of the vehicle.
B. Displays the instantaneous distance of the vehicle.
C. Displays the instantaneous speed of the vehicle.
D. All of the above.

Answer 1

Hint: This is an instrument seen in the vehicle to check the properties of the vehicle. It can be useful in vehicles like cars. These can help us to gain information about the engine performance and all other factors.

Complete step by step answer:
A speedometer in a vehicle is an important instrument in a vehicle which shows the current speed of the vehicle and the distance of the vehicle travelled primarily. It is measuring the instantaneous values of speed and distance not the average value of the distance and the speed. It also measures the miles per hour a vehicle travelled .Therefore all the three options given are right. So the correct answer is option D.

So the correct answer is option D.

Note:
It is the instantaneous speed and the distance measured using the speedometer. Not the average value. And also the most common known use of the speedometer is the measuring of speed as the name indicates, but it also serves other duties too which is to be kept in mind. when we look at the working of speedometer, we can see that at one end of the wire inside is when we look at the working of speedometer, we can see that at one end of the wire inside is a magnet which sits inside a cup like thing inside the speedometer known as drag cup. This cup is made up of nonmagnetic material like aluminium. As the wire rotates, the magnet spins, which creates a magnetic field .This will tend to turn the drag cup in the similar direction. The spindle which is connected to the pointer of the speedometer is attached to the drag cup. The spiral spring helps to bring counter rotation of the drag cup. This is how the instrument works: a magnet which sits inside a cup-like thing inside the speedometer known as a drag cup .This cup is made up of nonmagnetic material like aluminium. As the wire rotates, the magnet spins, which creates a magnetic field .This will tend to turn the drag cup in the similar direction. The spindle which is connected to the pointer of the speedometer is attached to the drag cup. The spiral spring helps to bring counter rotation of the drag cup. This is how the instrument works.