Question

The p.d across a lamp is 12v. How many joules of electrical energy are change into heat and light when: A current of 2Ampere flows through it.​

Answer 1

Question:

• The p.d across a lamp is 12v. How many joules of electrical energy are change into heat and light when: A current of 2 Ampere flows through it in 10 seconds.

Answer:

• 240 J

Explanation:

>> I = Q/T

=> 2 = Q/10

∴ Q = 20 C

___________

>> V = W/Q

=> 12 = W/20

∴ W = 240 J

Here, we have:

• I = Electric current
• Q = Charge
• T = Time taken
• W = Work done
• V = Potential difference

Answer 2

Answer:

240J__________________________