What is the metric unit for time?
1 answer:
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Answer:
LED run before the batteries are depleted is 3.87 hours
Explanation:
given data
battery = 4 AA
battery is rated = 1.2V, 2550 mAh
power = 3 W
efficient = 95%
to find out
How long will the LED run before the batteries are depleted
solution
we consider here power delivered by battery is = x
so power = x × efficient
3 = x 95%
x = 3.15 W
and
voltage by 4 battery is = 4 × 1.2 = 4.8 V
so current will be =
current =
current = 0.6577 A
so total discharge hours =
total discharge hours =
time = 3.87 hours
so LED run before the batteries are depleted is 3.87 hours
Complete Question
The complete question is shown on the first uploaded image
Answer:
The correct option is option 3
Explanation:
From the question we are told that
The diameter of solenoid 1 is
The length of solenoid 1 is
The number of turns of solenoid is
The diameter of solenoid 2 is
The length of solenoid 2 is
The number of turns of solenoid 2 is
Generally the magnetic in a solenoid is mathematically represented as
From this equation we see that
Here C stands for constant
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