What is the electric potential at a point in space if a charge of 7.3 × 10-17 coulombs at that point has a potential energy of 6.4 × 10-17 joules?

0.88 volts

Explanation:

We are given the amount of charge of a point ( 7.3 × 10^-17 ) along with its potential energy ( 6.4 × 10^-17 joules ).

We are to find the electrical potential at this point.

To find this, we will use the following formula:

Substituting the given values in the above formula:

V = 0.88 volts

V= 1.32 V

Explanation:

Electrical potential energy is calculated using the equation

Ue=1/2CV² where C is the charge and V the voltage at that point in space.

Making V the subject of the formula;

V= √( 2Ue /C)

V= √(2×6.4×10⁻¹⁷÷(7.3 × 10⁻¹⁷))

= 1.32 V

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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