Difference between bits per object and number of bits evaluated in bloom filter

See more:

hash

What is the difference between bits per object and number of hash functions evaluated for each object for storing objects in a bloom filter.
We evaluate k hash function for an object which set all k bits to 1. So we are just setting k bits for an object.

So how is it different number of bits per object.

What am I missing here ?

Thanks

What I have tried:

I am doing the course on Algorithms by Stanford University