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galina1969 [7]
3 years ago
5

A student wants you to demonstrate that an electric current will produce a magnetic field. Which set of objects could be used to

demostrate this?
a.A battery, a coil of wire and a compass.EliminateB)A compass, some paper clips and a battery.
c.A battery, an iron nail and a long copper wire.
d.An iron nail, a permanent magnet and a battery.
Physics
2 answers:
antoniya [11.8K]3 years ago
8 0

Answer:

Its A

Explanation:

I did the test ;,>

Taya2010 [7]3 years ago
6 0
A. a battery a coil of wire and a compass
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In an RC-circuit, a resistance of R=1.0 "Giga Ohms" is connected to an air-filled circular-parallel-plate capacitor of diameter
solniwko [45]

Answer:

\tau = 1\ ms

Explanation:

First we need to find the capacitance of the capacitor.

The capacitance is given by:

C = \epsilon_0 * area / distance

Where \epsilon_0 is the air permittivity, which is approximately 8.85 * 10^(-12)

The radius is 12/2 = 6 mm = 0.006 m, so the area of the capacitor is:

Area = \pi * radius^{2}\\Area = \pi * 0.006^2\\Area = 113.1 * 10^{-6}\ m^2

So the capacitance is:

C = \frac{8.85 * 10^{-12} * 113.1 * 10^{-6}}{0.001}

C = 10^{-12}\ F = 1\ pF

The time constant of a rc-circuit is given by:

\tau = RC

So we have that:

\tau = 10^{9} * 10^{-12} = 10^{-3}\ s = 1\ ms

7 0
3 years ago
An incandescent light bulb produces light when electrons flow through the
azamat
<span>Electric current passes through a filament of an incandescent bulb, thereby increasing it temperature. When current flows, it contains electrons through the filament to produce light. The answer is c. Typically, incandescent light bulb consists of a glass enclosure that contains tungsten filament. The glass enclosure contains either a vacuum or an inert gas that serves as the filament protection from evaporating. Incandescent light bulbs contain a stem attached at to its base to allow the electrical contacts to run through the envelope without gas or air leaks</span>
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3 years ago
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Early in the twentieth century, a group of German psychologists noticed that people tend to organize a cluster of sensations int
yan [13]

Answer:

The correct option is D

D) Gestalt

Explanation:

In the earlier 20th century, a group of German scientists named Max Wertheimer, Wolfgang Köhler and Kurt Koffka, noticed that people tend to organzie a cluster of information into a Gestalt.

Gestalt is a German word which means the way things are placed or put together as a whole. In the field of phychology, it can be defined as a pattern or configuration. In this context, it included the human mind and its behavior as a whole.

The Gestalt theory states that:

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5 0
3 years ago
At a speed of 60 mph, how far does your car travel in 3 seconds
Viefleur [7K]

One of the many random useless factoids that I carry around
in my head is the factoid that 60 miles per hour is equivalent
to exactly 88 feet per second.

So in three seconds at that speed, you would cover exactly

                       (3 x 88) = 264 feet.


4 0
3 years ago
How much displacement will a spring with a constant of 120N / m achieve if it is stretched by a force of 60N?
Andrew [12]

Answer:

Explanation:

There's a formula for this:

F = k*displacement

F being force, k being the spring constant, and displacement being the change in x

We are given the force and the spring constant, so this is essentially isolating the Δx term. Do 60N/120N per meter. The newtons cancel out and you get a final answer of Δx = 0.5 meters

3 0
3 years ago
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