1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vampirchik [111]
3 years ago
7

While teaching about transistors, Mr. Mendoza shows a video of a hand pump being used to draw water from a well. He points out h

ow the person primes the pump by pouring a small amount of water into it before the water would start to flow. No matter how much water is used to prime the pump, once started, the pump provides a steady flow of water while the handle is operated.
What is Mr. Mendoza using the hand pump to model?

A. its use as a switch to make a small signal into a large signal
B. its use as an amplifier to make a small signal into a large signal
C. its use as a switch to turn on a large current using a small current
D. its use as an amplifier to turn on a large current using a small current
Physics
2 answers:
Alchen [17]3 years ago
5 0

Answer:

The answer is B,  Mr Mendoza is using the hand pump to model an amplifier to make a small signal into a large signal.

Explanation:

An amplifier basically is an electronic gadget used to cover lower signal or current  input into higher current, signal or output. In a situation where water is being pumped into a reservoir and the level of the reservoir is higher than that of the well, am amplifier can used used with the pump to increase the output current going into the pump thereby increase the speed and flow of water into the reservoir.

storchak [24]3 years ago
5 0

Answer:

B

Explanation:

Transistors are small pieces of semiconductor electronic devices that are used basically for amplification and switching of signals.

They are used to amplify a small signal to a larger one.

They function as switches as they determine if current flows through the collector emitter path. When a voltage is applied to the base it allows currents to flow through to C-E path, but if no current is applied no current will flow .

In the illustration given in the question the pump provides a steady flow of water when a small quantity of water is fed into it. This can be compared to the use of transistors as an amplifier in converting small signals into large signals.

You might be interested in
A Hall probe, consisting of a rectangular slab of current-carrying material, is calibrated by placing it in a known magnetic fie
Citrus2011 [14]

Answer:

(a) 0.345 T

(b) 0.389 T

Solution:

As per the question:

Hall emf, V_{Hall} = 20\ mV = 0.02\ V

Magnetic Field, B = 0.10 T

Hall emf, V'_{Hall} = 69\ mV = 0.069\ V

Now,

Drift velocity, v_{d} = \frac{V_{Hall}}{B}

v_{d} = \frac{0.02}{0.10} = 0.2\ m/s

Now, the expression for the electric field is given by:

E_{Hall} = Bv_{d}sin\theta                            (1)

And

E_{Hall} = V_{Hall}d

Thus eqn (1) becomes

V_{Hall}d = dBv_{d}sin\theta

where

d = distance

B = \frac{V_{Hall}}{v_{d}sin\theta}                      (2)

(a) When \theta = 90^{\circ}

B = \frac{0.069}{0.2\times sin90} = 0.345\ T

(b) When \theta = 60^{\circ}

B = \frac{0.069}{0.2\times sin60} = 0.398\ T

5 0
2 years ago
A mercury thermometer is used to measure the temperature of boiling water.<br>Why?​
Rama09 [41]

Answer:

It has very high density, so a small bulb of a thermometer can contain much mercury. Mercury remains liquid state over a quite wide range of temperature because it freezes at 39°C and boils at 357°C.

Explanation:

6 0
3 years ago
E20E20: The word “virtual” refers to something that exists in effect but not in actual fact. How does this definition relate to
Lubov Fominskaja [6]

The correct answer (sample response) is:

The image seems to be behind the mirror, but nothing is really there.

Include the following in your response:

The image appears to be behind the mirror.

If someone looks behind the mirror, there is no image there.

|Huntrw6|

5 0
3 years ago
Read 2 more answers
How do I do these? Please help
ICE Princess25 [194]

Explanation:

4a)the displacement is the distance moved in a direction but since no direction is given, the displacement is equal to the distance

b) the distance moved is 400m because that's the length of the track

4 0
3 years ago
How many meters are in 32 kilometers
lukranit [14]

Answer:

32,000 m

Explanation:

Conversion

1km ===> 1000m

32km===>x

x = (32 × 1000) ÷ 1

5 0
3 years ago
Other questions:
  • The electrons equal or copy the number of _____
    10·2 answers
  • Platinum has a density of 21.4 g/cm3. if thieves were to steal platinum from a bank using a small truck with a maximum payload o
    12·1 answer
  • Find the mean and median of the following data set: 98, 87, 92, 79, 65, 91, 80, 92, 85, 86.
    11·1 answer
  • Which stage of Erik Erikson’s psychosocial theory of personality is the first one and occurs during infancy?
    15·1 answer
  • ASAP ONLY CORRECT ANSWERS PLZZZZZZZZZZZZZ
    13·2 answers
  • Hello, PLEASE ANSWER ASAP!!! Don't report my question or give me false answers but I'm freaking out. I was biking home from scho
    14·1 answer
  • A complete path through which charge can flow is an electric what?
    5·2 answers
  • Consider a car engine running at constantspeed. That is, the crankshaft of the en-gine rotates at constant angular velocity whil
    6·1 answer
  • PLS HELP ASAP<br><br> Assignment due in 30 min and a LOT more questions
    5·2 answers
  • Hi all, can u please help me in this. I would very appreciate it :)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!