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3 years ago

Which part of the motor is responsible for reversing the flow of current?

Physics

1 answer:

snow_tiger [21]3 years ago

8 0

Answer:

Commutator.

Explanation:

It is electrical switch and consist of cylinder. Split rings are two halves of a ring that act as a Commutator. When current in the coil is Zero and is about to change the direction.

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An uncharged capacitor and a resistor are connected in series with a switch and a 12 V battery. At the instant the switch is clo

balu736 [363]

Answer:

V = 12 V

Explanation:

Since a capacitor can't change the voltage between its plates instantaneously, this means that just after the switch is closed, the voltage through the capacitor is zero.
So, the current that flows in this moment is the same that would flow in a series circuit with only one resistor connected to the battery.
Applying KVL to the circuit (neglecting the presence of the capacitor which can be replaced by a short circuit just after closing the switch), the voltage through the resistor must be equal to the one of the battery, i.e., 12 V.

5 0

3 years ago

How does the wind turbine generator work?

AnnZ [28]

Answer: wind pushes directly against the blades of the turbine, which converts the linear motion of the wind into the rotary motion, then it spins the generator's rotor and the harder the wind pushes, the more electrical energy can be generated.

Explanation:

5 0

3 years ago

The molecular weight of oxygen gas (o2) is 32 while that of hydrogen gas (h2) is 2.

anzhelika [568]

use the formula: v^2=(3kT)/m

Where:

v is the velocity of a molecule

k is the Boltzmann constant (1.38064852e-23 J/K)

T is the temperature of the molecule in the air

m is the mass of the molecule

For an H2 molecule at 20.0°C (293 K):

v^2 = 3 × 1.38e-23 J/K × 293 K / (2.00 u × 1.66e-27 kg/u)

v^2 = 3.65e+6 m^2/s^2

v = 1.91e+3 m/s

For an O2 molecule at same temp.:

v^2 = 3 × 1.38e-23 J/K × 293 K / (32.00 u × 1.66e-27 kg/u)

v^2 = 2.28e+5 m^2/s^2

v = 478 m/s

Therefore, the ratio of H2:O2 velocities is:

1.91e+3 / 478 = 4.00

7 0

3 years ago

Why do clastic sedimentary rocks generally form underwater?

alekssr [168]

Because they eventually erode and then break and end up forming underwater.

6 0

3 years ago

In which of the following cases is work being done on an object? Question 2 options: Pushing against a locked door Carrying a bo

Serggg [28]

As we know that work done is defined as product of force and displacement in the direction of applied force

so we can say it is

$W = F.d$

or we can say

$W = Fdcos\theta$

so we will have following options

A)Pushing against a locked door

There is no work done in above case as there will be no displacement in that case so work done is ZERO

B) Carrying a box down a corridor

While we move done and carrying a box then work done by gravity on the box while our work done is negative work.

C) Pulling a trailer up a hill

In above case our work done to pull a box up a hill is positive work as we need to work against gravity

D) Suspending a heavy weight with a strong chain

During suspension there is no displacement so there will be no work done in above case

so correct answer will be

Pulling a trailer up a hill

6 0

4 years ago

Read 2 more answers