Question

In an electric circuit fro driving a current of 5 A for 5 minutes, a work of 1500 J has to be done. Find the emf applied in the circuit. (a) 4 volt (b) 3 volt (c) 2 volt (d) 1 volt

Answer 1

Answer:

In the previous section of Lesson 1, the concept of electric potential was introduced. Electric potential is a location-dependent quantity that expresses the amount of potential energy per unit of charge at a specified location. When a Coulomb of charge (or any given amount of charge) possesses a relatively large quantity of potential energy at a given location, then that location is said to be a location of high electric potential. And similarly, if a Coulomb of charge (or any given amount of charge) possesses a relatively small quantity of potential energy at a given location, then that location is said to be a location of low electric potential. As we begin to apply our concepts of potential energy and electric potential to circuits, we will begin to refer to the difference in electric potential between two points. This part of Lesson 1 will be devoted to an understanding of electric potential difference and its application to the movement of charge in electric circuits.

Answer 2

Answer:

Answer:

• Emf applied in the circuit=1 volt

Given:

• Current flow,i=5A
• Time,t=5*60sec=300sec
• Work done,w=1500J

To find:

• The emf applied in the circuit=?

Solution:

As we know that,

Work done=Vit

W=Vit

1500=V×5×300

V=5/5

V=1volt

So,The emf applied in the circuit=1volt