Physics, 22.03.2021 04:10 chonawilson4

A flashlight bulb connected to a 6 V battery draws a 0.5 current. What is the power used by the flashlight bulb?
A. 3W
B. 12 W
C. 0.8 W
D. 5.5 W

Please answer this ASAP

Answers: 3

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Answer from: alexmoy45p8yd7v

A 3W

Explanation:

Have a good day!

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Answer from: stefan19367

Power = (voltage) x (current)

Power = (6 V) x (0.5 Amp)

Power = 3 watts

Answer from: Quest

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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A flashlight bulb connected to a 6 V battery draws a 0.5 current. What is the power used by the fla...

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