Parallel resistors

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Two $4\,\Omega$ resistors are connected in parallel. The equivalent resistance is:

8\,\Omega

4\,\Omega

2\,\Omega

1\,\Omega

Three $9\,\Omega$ resistors connected in parallel give an equivalent resistance of:

27\,\Omega

9\,\Omega

3\,\Omega

1\,\Omega

Adding more resistors in parallel causes the total resistance to:

A.Increase

B.Decrease

C.Stay the same

D.Become infinite

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