Question

In a given time interval, a charge of 4 C passes over an emf device while the energy spent by the device during the same time interval is 30 J.


What is the emf, E, of the emf device (in volts)?

Please guys i really need it

Answer 1

Answer:

the answer is 7.5 volts

Explanation:

v=w/q

v=30/4

v=7.5 v

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Answer 2

Given : In a given time interval, a charge of 4C passes over an Emf device while the energy spent by the device during the same time interval is 30 J.

To find : The EMF of the emf device in volts.

Solution : Energy spent by device = charge × emf

⇒30 J = 4C × emf

⇒emf = 30/4 = 7.5 volts.

Therefore emf of the device is 7.5 volts.

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