Answer:
The magnitude of force is
Solution:
As per the question:
The strength of Electric field due west at a certain point,
Charge, Q = - 6 C
Now, the force acting on the charge Q in the electric field is given by:
Here, the negative sign indicates that the force acting is opposite in direction.
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