Understanding the Electrostatic Model

Q.

Mechanics is the branch of physics that deals with __________.

Q.

I am not able to understand the concepts in physics which is thought in school. I am not able to understand the concepts thoroughly in the videos. For eg: vectors not able to be understood, laws of motion I am not able to solve problems. CNA you please give adivad or suggestions

Q. Define intensity of electric field and write its unit.

Q.

What does an axiom mean?

1. The laws of nature which explain cause and effect

2. The logical predictions of a model.

3. Definitions! made to express long sentences smartly

4. Statement or proposition which is regarded as established, accepted or self-evidently true.

Q.

Give the definition of classical mechanics.

Q.

newtonians mechanics

Q.

Which of these is not a basic assumption (axiom) of the model of electrostatics?

1. Charges come in two types

2. Charge is conserved

3. Charges cause lightning

4. Charges exist and matter carries charges

Q.

What do we mean when we say we completely understand mechanics?

1. That we know the definition of distance, displacement, acceleration and all these variables.

2. That we know how to draw a free body diagram alone

3. That we can question the correctness of Newton’s laws

4. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

Q.

Point charges $Q_1=5m-C$ (milli-coulomb) and $Q_2=6m-C$ (milli-coulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

1. 27N

2. 25N on Q₁ and 24N on Q₂

3. 23N

4. not enough information is given in the question.

Q. Is Gauss law valid for the gravitational fields also?

1. No.
2. May and may not.
3. Yes.
4. Can't say.

Q.

Point charges $Q_1=5mC$ (millicoulomb) and $Q_2=6mC$ (millicoulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

1. not enough information is given in the question.

2. 25N on Q₁ and 24N on Q₂

3. 23N

4. 27N

Q.

What does an axiom mean?

1. The laws of nature which explain cause and effect

2. Definitions! made to express long sentences smartly

3. Statement or proposition which is regarded as established, accepted or self-evidently true.

4. The logical predictions of a model.

Q. Two charged particles having charges $1$ and $-1$ $\mu$C and of mass $50$ g each are held at rest while their separation is $2$ m. Now the charges are released. Find the speed of the particles when their separation is $1$ m.

1. $\frac{3}{5}m{s}^{-1}$
2. $\frac{3}{10}m{s}^{-1}$
3. $\frac{1}{5}m{s}^{-1}$
4. $\frac{2}{7}m{s}^{-1}$

Q. Electrical, as well as gravitational affects, can be thought to be caused by fields. Which of the following is true of an electrical or gravitational field?

1. The field concept is often used to describe contact forces
2. Gravitational or electric field does not exist in the space around an object
3. Fields are useful for understanding forces acting through a distance
4. There is no way to verify the existence of a force field since it is just a concept

Q.

What do we mean when we say we completely understand mechanics?

1. That we can question the correctness of Newton’s laws

2. That we know the definition of distance, displacement, acceleration and all these variables.

3. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

4. That we know how to draw a free body diagram alone

Q.

What do we mean when we say we completely understand mechanics?

1. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

2. That we know the definition of distance, displacement, acceleration and all these variables.

3. That we know how to draw a free body diagram alone

4. That we can question the correctness of Newton’s laws

Q. Two point charges $A$ and $B$ having charges $+Q$ and $-Q$ respectively are placed at certain distance apart and force acting between them is $F$. If $25$% charge of $A$ is transferred to $B$, then force between the charges becomes

​​​​​​​$[$1 Mark$]$

1. $F$
2. $\frac{9F}{16}$
3. $\frac{16F}{9}$
4. $\frac{4F}{3}$

Q.

What does an axiom mean?

1. The laws of nature which explain cause and effect

2. Definitions! made to express long sentences smartly

3. Statement or proposition which is regarded as established, accepted or self-evidently true.

4. The logical predictions of a model.

Q. Write the various steps of the scientific method.

Q. Calculate the Coulomb force between them at this separation.

Q. A proton is released from rest, 10 cm from a charged sheet carrying charged density of $-2.21\times {10}^{-9}C/m^2$. It will strike the sheet after the time (approximately)

1. $4\mu S$
2. $2\mu s$
3. $2\sqrt{2}\mu S$
4. $4\sqrt{2}\mu s$

Q. Two charge particle P & Q having same charge $1\mu C$ and mass $4\mu kg$ are initially kept at the distance of $1mm$. Charge P is fixed, then the velocity of charge particle Q when the separation between them becomes $9mm$.

1. $5\times {10}^{3}m/s$
2. $3\times {10}^{3}m/s$
3. $7\times {10}^{3}m/s$
4. $2\times {10}^{3}m/s$

Q. Why theory of relativity does not apply on charges?

Q.

Point charges $Q_1=5mC$ (millicoulomb) and $Q_2=6mC$ (millicoulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

1. 27N

2. 25N on $Q_1$ and 24N on $Q_2$

3. 23N

4. not enough information is given in the question.

Q.

Point charges $Q_1=5mC$ (millicoulomb) and $Q_2=6mC$ (millicoulomb) are at a separation of 100m from each other. What is the magnitude of force on any one of the charge?

1. 27N

2. 25N on $Q_1$ and 24N on $Q_2$

3. 23N

4. not enough information is given in the question.

Q.

What do we mean when we say we completely understand mechanics?

1. That we can explain any mechanical observation by bringing it down to the assumptions of the model of Mechanics.

2. That we know the definition of distance, displacement, acceleration and all these variables.

3. That we know how to draw a free body diagram alone

4. That we can question the correctness of Newton’s laws

Q.

Which of these is not a basic assumption (axiom) of the model of electrostatics?

1. Charges exist and matter carries charges

2. Charges come in two types

3. Charge is conserved

4. Charges cause lightning