PHY301 Assignment No. 2 Announced

Q.1: By using any division rule find voltage across 4kohm resistance.

Q.2: Use nodal analysis to find IO in the network given below. Identify and label each node otherwise you will lose your marks. Write each step of the calculation to get maximum marks and also mention the units of each derived value

Q.3: Use to write for each reference the equations (final calculations not required).

DON’T MISS THESE Important instructions:

• Labeled and draw each circuit diagram, other wise you will lose your marks. Write each step of the calculation to get maximum marks.

To solve this assignment, you should have good command over first 13 lectures.

Upload assignments properly through LMS, (No Assignment will be accepted through email).

Write your ID on the top of your solution file.

All students are directed to use the font and style of text as is used in this document.

Don’t use colorful back grounds in your solution files.

Use Math Type or Equation Editor etc for mathematical symbols.

Use Paint or Corel draw to draw circuit diagrams.

This is not a ***** assignment, it is an individual assignment so be careful and avoid copying others’ work. If some assignment is found to be copy of some other, both will be awarded zero marks. It also suggests you to keep your assignment safe from others. No excuse will be accepted by anyone if found to be copying or letting others copy.

Don’t wait for the last date to submit your assignment.

PHY301 Assignment No. 1 solution

 

 

 

 Assignment 1(Fall 2010)

CIRCUIT THEORY (PHY301)

MARKS: 30

Due Date: November 02, 2010

DON’T MISS THESE Important instructions:

         

·          To solve this assignment, you should have good command over first 6 lectures.

·          Upload assignments properly through LMS, (No Assignment will be accepted through email).

·           Write your ID on the top of your solution file.

·          All students are directed to use the font and style of text as is used in this document.

·          Don’t use colorful back grounds in your solution files.

·          Use Math Type or Equation Editor etc for mathematical symbols.

·         This is not a group assignment, it is an individual assignment so be careful and avoid copying others’ work. If some assignment is found to be copy of some other, both will be awarded zero marks. It also suggests you to keep your assignment safe from others. No excuse will be accepted by anyone if found to be copying or letting others copy.

·          Don’t wait for the last date to submit your assignment.

·          You can draw circuit diagrams in “Paint” or in “Corel Draw”. The simple and easy way is to copy the given image in Paint and do the required changes in it.

Q.1

Find the equivalent resistance of given circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will lose your marks.

Q.2

For the given circuit below, find the current I₁, I_2, I₃ and voltage V_X

Q.3

Given below is a simple circuit containing a bulb (lamp), battery and two switches.

     

           

Describe the current flow in the circuit and Bulb (glow or not) for each given condition

1. When switch 1 and switch 2 both are not connected.
2. When switch 1 is connected and switch 2 is not connected.
3. When both switches are connected.

PHY301 Assignment No. 1 solution

 

 

 

 Assignment 1(Fall 2010)

CIRCUIT THEORY (PHY301)

MARKS: 30

Due Date: November 02, 2010

DON’T MISS THESE Important instructions:

         

·          To solve this assignment, you should have good command over first 6 lectures.

·          Upload assignments properly through LMS, (No Assignment will be accepted through email).

·           Write your ID on the top of your solution file.

·          All students are directed to use the font and style of text as is used in this document.

·          Don’t use colorful back grounds in your solution files.

·          Use Math Type or Equation Editor etc for mathematical symbols.

·         This is not a group assignment, it is an individual assignment so be careful and avoid copying others’ work. If some assignment is found to be copy of some other, both will be awarded zero marks. It also suggests you to keep your assignment safe from others. No excuse will be accepted by anyone if found to be copying or letting others copy.

·          Don’t wait for the last date to submit your assignment.

·          You can draw circuit diagrams in “Paint” or in “Corel Draw”. The simple and easy way is to copy the given image in Paint and do the required changes in it.

Q.1

Find the equivalent resistance of given circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will lose your marks.

Q.2

For the given circuit below, find the current I₁, I_2, I₃ and voltage V_X

Q.3

Given below is a simple circuit containing a bulb (lamp), battery and two switches.

     

           

Describe the current flow in the circuit and Bulb (glow or not) for each given condition

1. When switch 1 and switch 2 both are not connected.
2. When switch 1 is connected and switch 2 is not connected.
3. When both switches are connected.

PHY101 Assignment No. 1 solution

Assignment No 1 PHY101 2010

Solution :

 
“.When a credit card is “swiped” through a card reader, the information coded in a magnetic pattern on the back of the card is transmitted to the card holder's bank. Why is it necessary to swipe the card rather than holding it motionless in the card reader's slot?”

ANS: In a credit card reader, the magnetic strip on the back of a credit card is rapidly? swiped? past a coil within the reader. Explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip.

FALL 1st Assignment

Q # 1 Consider a box that is placed on different surfaces. Marks = 10
a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
Various possible situations are as under:
I. The box is at rest on a rough horizontal surface.
II. The box is at rest on a rough tilted surface.
III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.
IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.
V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing
a hill, and the box is sliding towards the back of the truck.
 

Answer Q1.
Answer (a) (I), (iii)
Answer (b) (ii), (IV)
Answer (c) (v)

In situation (I) and (ii) the box is not accelerating (so the net force on it must be zero) and there is no other force acting parallel to the horizontal surface; hence no  friction force is needed to prevent sliding. In situation (ii) and (IV) the box would  start to slide over the surface if no friction were present, so a static fraction force must act to prevent this.

In situation (V) the box is sliding over a rough surface, so a kinetic friction force acts on it.

Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5

Solution:-

 
In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them

PHY101 Assignment No. 1 solution

Assignment No 1 PHY101 2010

Solution :

 
“.When a credit card is “swiped” through a card reader, the information coded in a magnetic pattern on the back of the card is transmitted to the card holder's bank. Why is it necessary to swipe the card rather than holding it motionless in the card reader's slot?”

ANS: In a credit card reader, the magnetic strip on the back of a credit card is rapidly? swiped? past a coil within the reader. Explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip.

FALL 1st Assignment

Q # 1 Consider a box that is placed on different surfaces. Marks = 10
a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
Various possible situations are as under:
I. The box is at rest on a rough horizontal surface.
II. The box is at rest on a rough tilted surface.
III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.
IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.
V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing
a hill, and the box is sliding towards the back of the truck.
 

Answer Q1.
Answer (a) (I), (iii)
Answer (b) (ii), (IV)
Answer (c) (v)

In situation (I) and (ii) the box is not accelerating (so the net force on it must be zero) and there is no other force acting parallel to the horizontal surface; hence no  friction force is needed to prevent sliding. In situation (ii) and (IV) the box would  start to slide over the surface if no friction were present, so a static fraction force must act to prevent this.

In situation (V) the box is sliding over a rough surface, so a kinetic friction force acts on it.

Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5

Solution:-

 
In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them

PHY101 Assignment 1 - Solution

Q # 1: Consider a box that is placed on different surfaces. Marks = 10

a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
 

Various possible situations are as under:
 

I. The box is at rest on a rough horizontal surface.
 

II. The box is at rest on a rough tilted surface.

III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.

IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.

V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing a hill, and the box is sliding towards the back of the truck.

Solution: Answer Q1.

Answer (a) (I), (iii)

Answer (b) (ii), (IV)

Answer (c) (v)

In situation (I) and (ii) the box is not accelerating (so the net force on it must be zero) and there is no other force acting parallel to the horizontal surface; hence no friction force is needed to prevent sliding. In situation (ii) and (IV) the box would start to slide over the surface if no friction were present, so a static fraction force must act to prevent this.

In situation (V) the box is sliding over a rough surface, so a kinetic friction force acts on it.

Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5

Solution:-

In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them.

Q # 3: A traffic light of weight W hangs from two light cables; one on each side of the light. Each cable hangs at a 450 angle from the horizontal. What I the tension in each cable? Marks = 5

PHY101 Assignment 1 - Solution

Q # 1: Consider a box that is placed on different surfaces. Marks = 10

a) In which situation (s) is there no force acting on the box?
b) In which situation (s) is there a static friction force acting on the box?
c) In which situation (s) is there a kinetic friction force acting on the box?
 

Various possible situations are as under:
 

I. The box is at rest on a rough horizontal surface.
 

II. The box is at rest on a rough tilted surface.

III. The box is on the rough-surfaced flat bed of a truck- the truck is moving at a constant velocity on a straight, level road and the box remains in the same place in the middle of the truck bed.

IV. The box is on the rough-surfaced flat bed of a truck- the truck is speeding up on a straight, level road, and box remains in the same place in the middle of the truck bed.

V. The box is on the rough-surfaced flat bed of a truck- the truck is climbing a hill, and the box is sliding towards the back of the truck.

Solution: Answer Q1.

Answer (a) (I), (iii)

Answer (b) (ii), (IV)

Answer (c) (v)

In situation (I) and (ii) the box is not accelerating (so the net force on it must be zero) and there is no other force acting parallel to the horizontal surface; hence no friction force is needed to prevent sliding. In situation (ii) and (IV) the box would start to slide over the surface if no friction were present, so a static fraction force must act to prevent this.

In situation (V) the box is sliding over a rough surface, so a kinetic friction force acts on it.

Q # 2 A spaceship is moving in the vacuum of outer space, far from any planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton‘s first law say about this event? Marks = 5

Solution:-

In this situation there are no forces acting on the spaceship, so according to Newton’s first law, it will not stop. It continues to move in a straight line with constant speed, some science fiction movies have made use of very accurate science; this was not one of them.

Q # 3: A traffic light of weight W hangs from two light cables; one on each side of the light. Each cable hangs at a 450 angle from the horizontal. What I the tension in each cable? Marks = 5