In which of the following cases more electric energy is consumed per hour? (a) a current of 1 ampere passed through a resistance of 300 ohms (b) a current of 2 amperes passed through a resistance of 100 ohms.
Answers
Answer:
a) Electrical energy = 0.3 kWh
b) Electrical energy = 0.4 kWh
Explanation:
To find :
In which of the following cases more electric energy is consumed per hour?
(a) current of 1 ampere passed through a resistance of 300 ohms
(b) a current of 2 amperes passed through a resistance of 100 ohms.
Solution
Let us consider case A
(A) I = 1 A
R = 300 ohms
Power = resistance * current
P= 300 X 1 = 300 W
= 300/1000
= 0.3 kW
Electrical energy = PowerX time
= 0.3 X 1
= 0.3 kWh
Let us consider case But
(B) I= 2A
R= 100 ohms
Power= Resistance*current
P= 100 X 4
= 400 W
= 400/1000
= 0.4 kW
Electrical energy = 0.4 kW X 1
= 0.4 kWh
Answer:
a) Electrical energy = 0.3 kWh
b) Electrical energy = 0.4 kWh
Answer:
a) Electrical energy = 0.3 kWh
b) Electrical energy = 0.4 kWh
Explanation:
To find :
In which of the following cases more electric energy is consumed per hour?
(a) current of 1 ampere passed through a resistance of 300 ohms
(b) a current of 2 amperes passed through a resistance of 100 ohms.
Solution
Let us consider case A
(A) I = 1 A
R = 300 ohms
Power = resistance * current
P= 300 X 1 = 300 W
= 300/1000
= 0.3 kW
Electrical energy = PowerX time
= 0.3 X 1
= 0.3 kWh
Let us consider case But
(B) I= 2A
R= 100 ohms
Power= Resistance*current
P= 100 X 4
= 400 W
= 400/1000
= 0.4 kW
Electrical energy = 0.4 kW X 1
= 0.4 kWh
Answer:
a) Electrical energy = 0.3 kWh
b) Electrical energy = 0.4 kWh
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Explanation: