Question

a) Different
7.
The power output of a lamp is 6W. How much energy does the lamp give out in 2 mints:
a) 3J
b) 12J
c) 120 J
8. The algebraic sum of potential changes for a closed circuits is:
a)
Positive
b) Negative
c) Zero
all​

Answer 1

Answer:

1 watt is one joule per second by definition. So a6 watt lamp gives 6 joule per second times 120seconds (2 minutes)= 720 joules of energy in that period.

Gustav Kirchhoff’s Voltage Law is the second of his fundamental laws we can use for circuit analysis. His voltage law states that for a closed loop series path the algebraic sum of all the voltages around any closed loop in a circuit is equal to zero. This is because a circuit loop is a closed conducting path so no energy is lost.In other words the algebraic sum of ALL the potential differences around the loop must be equal to zero as: ΣV = 0. Note here that the term “algebraic sum” means to take into account the polarities and signs of the sources and voltage drops around the loop.

Answer 2

Answer: 720j

can u explain in calculation form