A bar magnet is 10 cm long. The distance between two pole is

a.8.5 cm b. 0.85cm c. 0.1m d. 0.58m

To determine the distance between the poles of a bar magnet that is 10 cm long, we need to understand how the poles are defined and what the question is asking. The poles of a magnet are the regions where the magnetic field is strongest, typically located at each end of the magnet. In a standard bar magnet, the distance between the poles is usually considered to be the entire length of the magnet, which in this case is 10 cm.

Analyzing the Options

Now, let’s look at the options provided:

• a. 8.5 cm
• b. 0.85 cm
• c. 0.1 m
• d. 0.58 m

Converting Units

Before we can compare these options, it’s helpful to convert them into the same unit. Since the length of the magnet is given in centimeters, let’s convert the option c (0.1 m) into centimeters:

0.1 m = 10 cm

Evaluating Each Choice

Now, we can evaluate each option in relation to the length of the magnet:

• Option a (8.5 cm): This is less than the total length of the magnet.
• Option b (0.85 cm): This is significantly shorter than the length of the magnet.
• Option c (10 cm): This matches the total length of the magnet, indicating that the distance between the poles is indeed the full length.
• Option d (0.58 m): This converts to 58 cm, which is much longer than the magnet itself.

Conclusion

Based on this analysis, the correct answer is option c, which states that the distance between the poles of the bar magnet is 0.1 m (or 10 cm). This aligns with the understanding that the poles are located at each end of the magnet, making the distance between them equal to the length of the magnet itself.