Physics, 15.10.2019 05:30 Alexisgrab

Aportable dvd player requires six 1.5-volt batteries to operate. if the resistance in the circuit is 7.2 ohms, what is the current?

a] 0.21 amps
b] 1.3 amps
c] 11 amps
d] 65 amps
e] 1.8 amps

Answers: 1

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Answer from: paolaviviana

Current = (6*1.5)/7.2= 9/7.2=1.25A=1.3A option B

Answer from: nahimi

Hello!

A portable DVD player requires six 1.5-volt batteries to operate. If the resistance in the circuit is 7.2 ohms, what is the current?

Data:

We have six 1.5 volt batteries, soon, your tension (V)

V = 1.5 * 6 = 9 Volts

R (resistance) = 7.2 ohms

i (Current intensity) = ? (in Amps)

Solving (Ohm's First Law):

$i = \dfrac{V}{R}$

$i = \dfrac{9}{7.2}$

$\boxed{\boxed{i = 1.25\:amps}}\end{array}}\qquad\checkmark$

Note: If we consider the template by approximation, the answer would be:

$\boxed{\boxed{\boxed{i\approx 1.3\:amps}}}$

B] 1.3 amps

____________________________________

I Hope this helps, greetings ... Dexteright02! =)

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.

Answer from: Quest

Ithink it’s 98 because jajajjajansmsmjs

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