What is the SI unit of electric potential difference (voltage)?
Answer and explanation
Correct answer: D. Volt (V), equivalent to Joules per Coulomb of electric charge
- Step 1: Voltage is electric potential difference, defined as energy per unit charge: 1 Volt = 1 Joule / 1 Coulomb. Step 2. Amperes measure current, Ohms measure resistance, and Watts measure power. Answer: Volt (V), equivalent to Joules per Coulomb of electric charge. Why not the others: V = J/C is the fundamental definition of the Volt.
Practise more Mechanics, Forces, Work, Power, Energy and Wave Systems.
Free questions with an explanation for every one, and full timed National Certificate of Educational Achievement mock tests.
More Mechanics, Forces, Work, Power, Energy and Wave Systems questions
- What is the net force acting on a 1200 kg car travelling along a straight highway at a constant velocity of 100 km/h?
- A crate of mass 40 kg is pushed across a horizontal concrete floor with a horizontal force of 150 N. If a constant frictional force of 70 N…
- How much work is done when a student lifts a 15 kg school backpack vertically through a height of 1.2 metres (take g = 10 N/kg)?
- A cyclist of total mass 80 kg accelerates from rest to 10 m/s in 4 seconds. What is the average power output of the cyclist over this interv…
- A stone is dropped from rest from the edge of a cliff in the South Island and hits the ground after 3.0 seconds. What is the height of the c…
- Why does a person wearing snowshoes not sink deeply into fresh powder snow in the Southern Alps, whereas a person in standard boots does?