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
Nataly [62]
3 years ago
10

A cassette recorder uses a plug-in transformer to convert 120 V to 12.0 V, with a maximum current output of 200 mA. What is the

current input?
Physics
1 answer:
goldfiish [28.3K]3 years ago
4 0

Answer:

20 mA

Explanation:

We have given that the transformer convert 120 V to 12 V means it is a step down transformer

The turn ratio of the transformer is given as a=\frac{N_1}{N_2}=\frac{V_1}{V_2}=\frac{120}{12}=10 here V_! is primary voltage and V_2 is secondary voltage

As the voltage decreases from primary to secondary so current will increase from primary to secondary

We have given output current that is secondary current so primary that is input current will be less

So input current =\frac{200}{10}=20mA

You might be interested in
A student makes a model of the sun-Earth system by swinging a ball around her head. Using this model, the student is trying to e
DedPeter [7]

Answer:

c. gravitational attraction between the sun and earth

8 0
3 years ago
Read 2 more answers
A lamp is labelled '230 V, 100 W'. How many joules of electrical energy is changed to thermal energy and light if the lamp is sw
viva [34]

Given;

V = 230V

Power, P = 100W

time, t = 2hrs = 7200s

from,

P = IV

and Energy, E= Pt

E = 100*7200

E = 720000 Joules

E = 720KJ

4 0
2 years ago
Read 2 more answers
What are all of the si units
mina [271]

Here you go

There are seven basic units in the SI system: the meter (m), the kilogram (kg), the second (s), the kelvin (K), the ampere (A), the mole (mol), and the candela (cd).


Hope it helps you

Please mark me as Brainsliest

5 0
3 years ago
If two forces act on an object, what is the relationship between the two forces? (pls explain)
Westkost [7]

Answer:

B. The larger force causes more acceleration than the smaller.

Explanation:

For example, let me use a child and a grown up. The child represents the smaller force while the grown up represents the larger force. If they are pushing the same object of different sides, obviously the side with the grown up will push and move to the side of the child because it is stronger.

3 0
2 years ago
If the radius of the equipotential surface of the point charge is 14.3 m at a potential of 2.20 kV, what will be the magnitude o
PSYCHO15rus [73]

Answer:

The magnitude of the point charge is 3.496 x 10⁻⁶ C

Explanation:

Given;

radius of the surface, r = 14.3 m

magnitude of the potential, V = 2.2 kV = 2,200 V

The magnitude of the point charge is calculated as follows;

V = (\frac{1}{4\pi \epsilon _0} )(\frac{Q}{r} )\\\\V = \frac{KQ}{r} \\\\Q = \frac{Vr}{K} \\\\Q = \frac{2,200 \times 14.3}{9\times 10^9} \\\\Q = 3.496 \times 10^{-6} \ C\\\\Q = 3.496 \ \mu C

Therefore, the magnitude of the point charge is 3.496 μC

6 0
2 years ago
Other questions:
  • An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s2? (Formula: F=ma)
    6·2 answers
  • How much heat in joules would you need to raise the temperature of 1 kg of water by 5 °C?
    12·1 answer
  • Which of the following are comprised of proteins?
    9·1 answer
  • Carlos was camping and getting cold as the sun went down. He wanted to light a fire for warmth and light. However, he discovered
    8·1 answer
  • A constant magnetic field of 0.50 T is applied to a rectangular loop of area 3.0 × 10-3 m2. If the area of this loop changes fro
    12·1 answer
  • True or False. If your skin is wet, the body's resistance to electric shocks increases.
    12·2 answers
  • Dump Tower is 96 stories tall. A small, 1.2-kg object is dropped over the side of the roof of the tower and accelerates toward t
    11·1 answer
  • You have the following problems and your friend gives you suggestions .work in pairs and have true conversation .Your prounction
    5·1 answer
  • Resistances is inversely proprtional to___of the conductor​
    15·2 answers
  • Gus likes to create pictures or clusters to show the information he has learned. What kind of learner is Gus likely to be?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!