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Electrostatics

Electrostatics is the branch of physics that deals with the study of charges at rest. A common electrostatic phenomena is plastic wrap sticking to your hand and itself when removed from the box. Everything to do with electrostatics goes in this category.

1,860 Questions

When a balloon is rubbed against a cloth electrons move because?

When a balloon is rubbed against a cloth, electrons are transferred from the cloth to the balloon. This causes the balloon to become negatively charged and the cloth to become positively charged. The movement of electrons between the objects creates static electricity.

What is ballistic galvanometer.Give the construction and theory of moving coil ballistic galvanometer.?

a ballistic galvanometer is a specially designed galvanometer suitable for measuring the total quantity of electricity or charge displaced by a varying current of short duration such as charging & discharging of a capacitor >>>>

How can a negatively charged rod charge an electroscope positively?

When a negatively charged rod approaches an electroscope, it induces a separation of charges within the electroscope. Electrons in the electroscope are repelled by the negative charge of the rod and move to the opposite end of the electroscope, leaving a net positive charge at the top. This gives the electroscope a positive charge, even though the initial influence was negative.

What process is used when electrons are transferred from one object to another to prodice static electricity?

The process is called electron transfer, where electrons move from one object to another due to friction or contact. When electrons are transferred, one object becomes negatively charged while the other becomes positively charged, resulting in static electricity build-up.

When a plastic rod is rubbed with a cloth the plastic rod gains what?

When a plastic rod is rubbed with a cloth, the plastic rod gains a static electric charge. This charge is due to the transfer of electrons between the rod and the cloth, creating an imbalance of positive and negative charges on the rod's surface.

How do you describe the first experiment with static electricity?

The first known experiment with static electricity is attributed to Thales of Miletus in ancient Greece. He observed that amber, when rubbed with fur, could attract objects like feathers or small pieces of paper. This phenomenon laid the foundation for further studies on static electricity by other scientists.

What are the advantages and disadvantages of tunnel diode?

Advantages: Tunnel diodes have high switching speeds and low power consumption, making them ideal for high-frequency applications. They also have a negative resistance region that can be useful in oscillator circuits.

Disadvantages: Tunnel diodes have a limited operating voltage range and are sensitive to temperature variations. They also have limited applications compared to other diode types.

Why a charged electroscope will discharged when placed near a radioactive material?

1.

Electroscopes can be used to detect electronic charges and when a electroscope is given negative charges they repel each other and spread apart. They will remain apart until their electrons have somewhere to go and it combines with positive charges. When nuclear radiation is moving through the air it can remove electrons from some molecules In the air and cause other molecules in the air to gain electrons. - B0N3S

Is static electricity is an excess of neutrons?

Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge. Static electricity is named in contrast with current electricity, which flows through wires or other conductors and transmits energy.

Will rubbing a silk cloth on glass cause electrons to move to the cloth?

Yes, rubbing a silk cloth on glass cause electrons to move to the cloth. As a result, glass rod acquires positive charge and silk acquires negative charge.

What is a charge in a battery not an example of static electricity?

A charge in a battery is not an example of static electricity because it involves a flow of electrons through a circuit to generate a current, whereas static electricity is the accumulation of electric charges on the surface of an object. Battery charges result from chemical reactions within the battery that create a potential difference between the positive and negative terminals, allowing for the transfer of energy in the form of electricity.

What is the stationary of electric charge?

The stationary of electric charge refers to the property of electric charges that causes them to remain at rest or in constant motion unless acted upon by an external force. Charges with like signs repel each other, while charges with opposite signs attract each other, which can result in stationary or moving configurations based on the balance of forces involved.

Why leaves move closer together if the rod has the opposite charge to the electroscope?

When a charged rod is brought near an electroscope with the opposite charge, the positive and negative charges in the electroscope are attracted to the rod. This causes the leaves to come closer together as the negative charges in the leaves are attracted to the positively charged rod. This movement indicates that the electroscope has detected a charge.

In which direction does the electric field point at a position direcly south of a positive charge?

The electric field points away from a positive charge in all directions, meaning it would also point away to the south of the charge.

What is a electric is the loss of static electricity as charges move off an object?

Electric discharge is the loss of static electricity as charges move off an object, typically through the air or another medium. This phenomenon can result in visible effects like sparks or arcs of light as the charges equalize between two objects with different electrical potentials.

Three charges q1 q2 and q3 are kept at the vertices of an equilateral triangle. The net force on q3 is F. Then what is the net force on q1?

The net force on q1 will also be F, but in the opposite direction. This is because the forces on q1 and q3 are equal in magnitude and opposite in direction due to the symmetry of the equilateral triangle.

Two objects of equal positive charge are separated by 0.0029 m and experience an electric force of 0.98 N What is the charge of each object?

The equation for Coulomb's Law is: Force = k(q1q2)/r2

k is a constant: 9 x 109 Nm2/C2

q1 and q2 are the charges

r is the distance between the two charges

  1. Since the charges are equal and we are solving for the charges, we should rewrite the equation: F = kq2/r2 which means: q = sqrt(Fr2/k)
  2. Plug in the given values:

    q = sqrt[(0.98 N)(0.0029 m)/(9 x 109 Nm2/C2)]

  3. q = sqrt(9.1576 x 10-16 C2) (Note: units cancel out)
  4. q = 3.026 x 10-8 C (Note: 'sqrt' means 'square root')

Can you tell if an object has a positive or negative charge with a electroscope?

Yes, an electroscope can determine if an object has a charge, but it cannot distinguish between a positive or negative charge. If the object causes the electroscope's leaves to diverge, it indicates the presence of a charge on the object. Further experiments or additional methods are required to determine the polarity of the charge.

What describes the usual way by which material can gain a positive charge?

Material can gain a positive charge by losing electrons. This can happen through processes such as friction, conduction, or induction, where electrons are transferred from one material to another, resulting in one material having an excess of protons and a positive charge.

Why do the electrons jump in an electrostatic discharge?

Electrons jump in an electrostatic discharge because of a buildup of electric charge, creating a potential difference between two objects. When the potential difference becomes high enough, the electrons move rapidly to neutralize the charge imbalance, producing a visible discharge of electricity.

An electricdipoleconsist of two points charges Q1 plus 12nC and Q2-12nC placed 10cm apart. A.)compute the potential at points abc.B.) calculate the work done in moving an electron from point a to b?

A) The potential at point A, B, and C will be: V_A = k(Q1/0.1) - k(Q2/0.1), V_B = 0, V_C = k(Q2/0.2).
B) The work done in moving an electron from point A to B is: W = q(V_B - V_A). Given q = charge of an electron = -1.6 x 10^-19 C, the work done can be calculated.

Is static electricity caused by opposite charges?

Yes, static electricity is caused by the buildup of electric charge on the surface of an object. This charge imbalance can occur when two objects with opposite charges come into contact and become separated, creating a static charge.

What kind of force is static electricity?

Static electricity is a non-contact force caused by an imbalance of electric charges on the surface of two objects. It is based on the attraction or repulsion of charged particles and can create forces that cause objects to stick together or repel each other.

How do charges cause static electricity?

Charges cause static electricity through friction. When two objects rub against each other, electrons can transfer from one object to the other, causing one object to become positively charged and the other negatively charged. This build-up of charge creates static electricity.