The answer is 50 i. e. C

Explanation:

If the potentiometer is assumed to be linear

Then one one quarter of the total resistance will be below the slider and three quarters of the resistance will be above the slider.

To get zero voltage reading, 150 must be 3/4 of the total resistance of the right leg

150 = 0.75(150 + R)

150 = 112.5 + 0.75R

37.5 = 0.75R

R = 50 Ω

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

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