Solved Examples on Heating Effect of Electric Current

Example 1: 100 J of heat energy is produced by an electrical appliance that is used for 1 sec and is having a resistance of 4 ohms. Find and calculate the potential difference of the appliance.

Solution:

As we know,

H = I²×R×t

Given, H = 100 J, R = 4 ohm, t = 1 sec

Therefore, 100J=I²×4×1

I = 5 A

From ohm’s law we know

V=I×R

Therefore, V = 5A × 4Ω

V = 20 V

Therefore, the potential difference generated is 20 V.

Example 2: Find out the heat produced by the electric toaster when it is used for 5 minutes. The current given was 2 A and its resistance is 3 ohms.

Solution:

As we know,

H = I²×R×t

Given, I = 2 A, R = 3 ohm, t = 5 min = 300 sec

Therefore, H=2²×3×300J

H = 22×900 J

Therefore, H=4×900 J

H = 3600 J

Hence, the heat that is produced or liberated by the electrical toaster is 3600 J.

Example 3: The heat generated is 100 J from an electrical fan which has a potential difference of 10 V and the time for which it is used is 10 sec. Find what the amount of electrical current that is used is?

Solution:

As we know,

H = V × I × t

Given, H = 100 J, V = 10 V, t = 10 sec

Therefore, 100J=10V×I×10

∴100J = 100 × I

I = 1 A.

Therefore, the current used is 1 A.

Example 4: What is the power consumed if a device or appliance is operated at 1 V potential difference and 6 A current?

Solution:

As we know,

P = V × I

Given, V = 1V AND I = 6 A

P = 1 V × 6 A

P = 6 W

Hence, the power that has been consumed is 6 W.

Example 5: What is the power consumed if a toaster having 3-ohm resistance is operated at 1 A current?

Solution:

As we know,

P = I² × R

Given, I = 1 A and R = 3 ohm

∴P = 1² × 3Ω

P = 3 W.

Therefore, the power consumed has been calculated to be 3 W.

Heating Effect of Electric Current is a phenomenon that is generally used in our daily life. The electric kettle, toaster, heater, and other appliances are utilized as alternates for traditional cooking and laundry methods. Electric bulbs, which are an alternative to conventional lighting, utilize the same concept. Over time, these technologies have revolutionized the world. Conductors or Wires produce heat energy when a current pass through them. This is because of the fact that when an electric current passes through it, fast electron collisions start to occur. This concept or phenomenon is known as the Heating Effect of Electric Current. Hence, the idea of the heating effect of electric current and its applications will be covered in this article in detail!