A circuit with a resistance of #7 Omega# has a fuse melts at #6 A#. Can a voltage of #21 V# be applied to the circuit without blowing the fuse?

1 Answer
Roella W.
Feb 15, 2016

Yes

Explanation:

This is an application of Ohm's Law, which states that the voltage #V = I*R# where #I# is the current and #R# is the resistance.

#21 = I*7# to calculate what current the stated voltage will produce.

#I=21/7 = 3A#

#3A < 6A#

There fore the fuse will not blow.

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