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
Deffense [45]
2 years ago
13

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity?

Physics
2 answers:
Shtirlitz [24]2 years ago
4 0

Answer:

Alternating current, produced by

Electro magnetic induction

Explanation:

When a solenoid wire or wound copper wire is made to cut across a stationary magnetic field, a current is generated in the coil, which is proportional to the strength of the magnetic field.

LUCKY_DIMON [66]2 years ago
3 0
Induced Alternating current 

emf = - N dQ/dt

Q is the flux

You might be interested in
An object that is thrown straight up falls back to Earth. This is one-dimensional motion. (a) When is its velocity zero? (b) Doe
maw [93]

Answer:

Explanation:

(a) The velocity of object is zero when it is at maximum height.

(b) The direction of velocity changes as it starts moving downwards after it reaches the maximum height.

(c) Acceleration due to gravity always acts downwards so its sign remains same.

8 0
3 years ago
Read 2 more answers
If a 75-kg skater starts his skate at 8.0m, at his lowest point (height = 0), what is
Tanya [424]
Mgh= 1/2 m v^2
gh= 1/2 v^2 9.8 * 8=  1/2 v^2
solve for v
V = sqrt(2gH)where H = 8 m.
6 0
2 years ago
If you have two objects on the edge of a cliff, how can you determine which one has the most potential energy?
True [87]

Answer: now take this with a grain of salt because I'm in middle school but I think that the more massive object has more potential energy.

Explanation:

5 0
3 years ago
A food packet is dropped from a helicopter during a flood-relief operation from a height of 750 meters. Assuming no drag (air fr
Leviafan [203]

1. Velocity at which the packet reaches the ground: 121.2 m/s

The motion of the packet is a uniformly accelerated motion, with constant acceleration a=g=9.8 m/s^2 directed downward, initial vertical position d=750 m, and initial vertical velocity v_0 = 0. We can use the following SUVAT equation to find the final velocity of the packet after travelling for d=750 m:

v_f^2 -v_i^2 =2ad

substituting, we find

v_f^2 = 2ad\\v_f = \sqrt{2ad}=\sqrt{2(9.8 m/s^2)(750 m)}=121.2 m/s

2. height at which the packet has half this velocity: 562.6 m

We need to find the heigth at which the packet has a velocity of

v_f=\frac{121.2 m/s}{2}=60.6 m/s

In order to do that, we use again the same SUVAT equation substituting v_f with this value, so that we find the new distance d that the packet travelled from the helicopter to reach this velocity:

v_f^2-v_i^2=2ad\\d=\frac{v_f^2}{2a}=\frac{(60.6 m/s)^2}{2(9.8 m/s^2)}=187.4 m

Which means that the heigth of the packet was

h=750 m-187.4 m=562.6 m

3 0
2 years ago
Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up
kirza4 [7]

Answer:

I believe the answer is b

Explanation:

5 0
3 years ago
Other questions:
  • A battery has an emf of 15.0 V. The terminal voltage of the battery is 12.2 V when it is delivering 14.0 W of power to an extern
    10·1 answer
  • Consider the wave function y(x)-Find the probability of fi in the range -a
    10·1 answer
  • An electron in the n = 6 level of the hydrogen atom relaxes to a lower energy level, emitting light of λ = 93.8 nm .find the pri
    14·2 answers
  • A man runs 650 m east and then turns and runs 850 m west. This takes him 240 seconds.
    9·1 answer
  • The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 above the horizon
    11·1 answer
  • B) Explain the method of preparing electromagnet. How do you test the
    5·1 answer
  • An energy-efficient water heater draws 4 amps in a 220-volt circuit. It costs $75 more that a standard water heater that draws 1
    13·1 answer
  • Use Kirchoff first law and second law to derise the expression for the total resistancs​
    11·1 answer
  • A long thing bar of copper is heated evenly along it's length
    11·1 answer
  • Planet-X has a mass of 4.74×1024 kg and a radius of 5870 km. The First Cosmic Speed i.e. the speed of a satellite on a low lying
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!