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3 years ago

Current is produced when charges are accelerated by an electric field to move to a position of lower

1 answer:

8 0

Current is created when charges are quickened by an electric field to move where the position of lower temperature. An electric current is a stream of electric charge. In electric circuits, this charge is regularly conveyed by moving electrons in a wire.

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An elevator is moving upward with a speed of 9.2 m/s. 3.8 seconds later, the elevator is still moving upward, but its speed has

Zigmanuir [339]

From the calculations, the acceleration of the elevator is obtained as 1.5m/s^2

<h3>What is acceleration?</h3>

The term acceleration has to do with the rate of change of velocity with time.

Given that;

u = 9.2 m/s

v = 15.8 m/s

t = 3.8

a = ?

The v = u + at

a = v - u/t

a = 15 - 9.2/3.8

a = 1.5m/s^2

Learn more about acceleration:brainly.com/question/12550364

#SPJ1

6 0

2 years ago

An absent-minded Penn State professor drives from State College to Tyrone, 20 miles away, at 60 mph (miles per hour), before rea

BaLLatris [955]

Answer:20 mph

Explanation:

Given

distance between college to Tyrone=20 miles

Given professor drives with a velocity of 60 mph

he returns to college after reaching tyrone and then again drive to tyrone.

so his net displacement is 20 miles

time taken to cover 20 miles is $\frac{1}{3}$ hr

average velocity $=\frac{Displacement}{Time\ taken}$

$V_{avg}=\frac{20}{\frac{1}{3}+\frac{1}{3}+\frac{1}{3}}$

$V_{avg}=\frac{20}{1}=20 mph$

8 0

4 years ago

A wheel has a rotational inertia of 16 kgm2. Over an interval of 2.0 s its angular velocity increases from 7.0 rad/s to 9.0 rad/

german

Answer:

<h2>128.61 Watts</h2>

Explanation:

Average power done by the torque is expressed as the ratio of the workdone by the toque to time.

Power = Workdone by torque/time

Workdone by the torque = $\tau \theta$ = $I\alpha * \theta$

I is the rotational inertia = 16kgm²

$\theta = angular\ displacement$

$\theta = 2 rev = 12.56 rad$

$\alpha \ is \ the\ angular\ acceleration$

To get the angular acceleration, we will use the formula;

$\alpha = \frac{\omega_f^2- \omega_i^2}{2\theta}$

$\alpha = \frac{9.0^2- 7.0^2}{2(12.54)}\\\alpha = 1.28\ rad/s^{2}$

Workdone by the torque = 16 * 1.28 * 12.56

Workdone by the torque = 257.23 Joules

Average power done by the torque = Workdone by torque/time

= 257.23/2.0

= 128.61 Watts

8 0

3 years ago

A solenoid having N turns and carrying a current of 2.000 A has a length of 34 00 cm. If the magnitude of the magnetic field gen

umka21 [38]

Answer:

B) 1218

Explanation:

N = Total number of turns in the solenoid

L = length of the solenoid = 34.00 cm = 0.34 m

B = magnetic field at the center of the solenoid = 9 mT = 9 x 10⁻³ T

i = current carried by the solenoid = 2.000 A

Magnetic field at the center of the solenoid is given as

$B = \frac{\mu _{o}N i}{L}$

$9\times 10^{-3} = \frac{(4\pi\times 10^{-7} )N (2)}{0.34}$

N = 1218

3 0

4 years ago

Read 2 more answers

Which form of energy is due to the movement of electrons?

larisa86 [58]

Kinetic energy is motion of waves, electrons, atoms, molecules, substances, and objects. Potential energy is stored energy and the energy of position gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges.

I hope this helps you.

8 0

3 years ago

Read 2 more answers