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gizmo_the_mogwai [7]
3 years ago
9

A battery charges capacitor A until the potential difference between the two conductors of the capacitor is V.

Physics
2 answers:
kow [346]3 years ago
8 0

Answer:

The stored energy (Potential difference) of capacitor B which is equal to 2V is twice as much as capacitor A which has a stored capacity of 1V or V.  Increased voltage also implies a reduction in the current passing through it.  

Explanation:

Potential Difference is simply the work that has to be done in transferring a unit positive charge from one point to the other. It is also referred to as the "Electric Potential".

Also, the potential difference between points A and B, V(B) - V(A), is the change in Potential energy of a charge (q) moved from A to B, divided by the charge. Its units are joules per coulomb which is also equal to volt (V).

Note: the relationship between Potential energy and Potential difference is expressed thus: Change in Potential Difference = Change in Potential Energy / Charge.

mojhsa [17]3 years ago
7 0

Answer:

The energy stored in capacitor B is four times the energy stored in capacitor A

Explanation:

First let the write-out the formula for the energy stored in a capacitor in-terms of the capacitance(C)and the voltage(V)

\\W_{energy}=\frac{1}{2}CV^{2}\\

For capacitor A charged to a voltage of V, The energy stored is

\\W_{A}=\frac{1}{2}CV^{2}\\

and for capacitor B, we have \\W_{B}=\frac{1}{2}C[2V]^{2}\\

\\ W_{B}=2CV^{2}\\

From the energy stored in Capacitor A we can arrive at

2W_{A}=CV^{2}\\

if we substitute this value into the energy for capacitor B we arrive at

\\W_{B}=2(2W_{A} )\\W_{B}=4W_{A}\\

Hence we can conclude that the energy stored in capacitor B is four times the energy stored in capacitor A

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In case of collision of objects in two dimensions which statement is true after the collision?
Grace [21]

The correct answer to the question is : C) The horizontal momentum and the vertical momentum are both conserved. 

EXPLANATION :

Before coming into any conclusion, first we have to understand the law of conservation of momentum.

As per the law of conservation of momentum, the total linear as well as angular momentum of an isolated system is always conserved . The law of conservation of energy is a universal fact.

Hence, during any type of collision, the total momentum is always conserved.

Hence, the total horizontal momentum as well as total vertical momentum are always conserved during both elastic as well as inelastic collision.



5 0
3 years ago
Read 2 more answers
The repeating pattern of a minerals particles in a solid is called
Klio2033 [76]

Answer:

Crystal structure

Explanation:

The repeated pattern of similar particles in a material is called crystal. Crystal structure is the largest constituent unit of a solid matter.

The fundamental identity of a crystal structure is a unit cell that is formed by the arrangement of atoms or ions in a particular manner. A crystal is defined as a regular, long-ranged repeated arrangement of unit cells.

Crystal have a sharp melting and boiling point and they give a sharp edge on being cut with a knife.

5 0
2 years ago
A 3.35 kg object initially moving in the positive x direction with a velocity of 4.90 m s collides with and sticks to a 1.88 kg
ahrayia [7]

Answer:

The final components of velocity of the composite object is 3.33 m/s.

Explanation:

Given;

mass of the first object, m₁ = 3.35 kg

initial velocity of the first object, u₁ = 4.90 m/s in positive x-direction

mass of the second object, m₂ = 1.88 kg

initial velocity of the second object, u₂ = 3.12 m/s in negative y-direction

initial momentum of the first object, P₁ = 3.35 x 4.9 = 16.415 kgm/s

initial momentum of the second object, P₂ = 1.88 x 3.12 = 5.8656 kgm/s

The resultant velocity of the two objects is given by;

R² = 16.415² + 5.8656²

R² = 303.858

R = √303.858

R = 17.432 kgm/s

Apply the principle of conservation of linear momentum for inelastic collision;

total initial momentum before = total final momentum after collision

P₁(x) + P₂(y) = Pf

R = Pf

R = v(m₁ + m₂)

17.432 = v(m₁ + m₂)

where;

v is the final components of velocity of the composite object

v = \frac{17.432}{m_1 + m_2} \\\\v = \frac{17.432}{3.35+1.88} \\\\v = 3.33 \ m/s

Therefore, the final components of velocity of the composite object is 3.33 m/s.

8 0
2 years ago
An electron is ejected from the cathode by a photon with an energy slightly greater than the work function of the cathode. How w
Ksivusya [100]

It will be approximately equal.

<h3>How will the final kinetic energy change?</h3>

We can infer that all of the energy in the electron is Potential energy (PE) because the energy provided by the photon is hardly enough to outweigh the work function.

It will gain kinetic energy (KE) as it advances in the direction of the anode because it is moving through an electric field. All of the PE will have been transformed to KE by the time it reaches the anode.

According to the question

K = hf - W

W = Work function

The energy of photons is comparable. After conversion, there was only a little amount of KE remaining.

Therefore, PE (W) essentially equals KE (K).

It will about be equal.

Learn more about work function here:

brainly.com/question/19595244

#SPJ4

3 0
2 years ago
A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons.
Law Incorporation [45]
By definition, we have that the mechanical advantage is given by the following equation:
 MA =  \frac{W}{T} &#10;
 Where,
 W: is the load
 T: is the tension
 Substituting the values in the given equation we have:
 MA = \frac{1700}{340}
 MA = 5&#10;
 Therefore, the mechanical advantage is equal to 5.
 Answer:
 The mechanical advantage of this machine is:
 MA = 5
4 0
3 years ago
Read 2 more answers
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