Question

How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s; How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s

Answer 1

3 joules of electrical energy are transferred per second by a 6 V and 0.5 A lamp. So option D is correct.

Explanation:

1. Energy per second is defined as power.

2. Unit of power is Joule per second which also known as Watt.

3. Formula of power is

   Power = Voltage × Current      ...a)

4. Now for case of voltage =6 V, and current = 0.5 A

  from equation a)

  Power = 6 ×0.5 = 3$(\frac{J}{s})$ Which is electrical energy transferred per second.