Assignment 3: (Fall 2013)
PHYSICS (PHY101)
TOTAL MARKS: 30
Due Date: 23/01/2014
DON’T MISS THESE Important instructions:
To solve this assignment, you should have good command over first 28 lectures.
Upload assignments (Microsoft word) 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.
Write to the point and avoid from unnecessary explanation. Don’t copy/paste from
internet or any other source.
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.
Question# 1
A beam of electrons travels at 3.0×106 m/s through a uniform magnetic field of 4.0×10-2 T at right angles to the field. How strong is the force acting on each electron? Marks = 6 (Value of charge on electron is -1.60×10-19C)
Question# 2
A student of Physics is prying the field of a charge of unknown magnitude and sign. maps the field with a 2.0× 10–6 C test charge, and then repeats his work with a 4.0 × 10 charge.
He first
–6 C test
|
I. |
Would he find the same fields with the two test charges? Explain. | |
|
II. |
Would he measure the same forces with the two test charges? Explain. | Marks = 4+4 = 8 |
Question# 3
The whole electrical technology revolves round the devices i.e. motor, generator, and transformer. Write your answer in a single line that under what relationship these devices came into existence.Marks = 4
Question# 4
Consider a 12-V battery in a circuit with three resistors connected in series.
I.If the resistance of one of the resistors increases, how will the series resistance change? II. Will there be any change in the battery voltage?
| III. What will happen to the current? | Marks = 2+2+2 = 6 |
(Answer should not be more than a single line of above each part)
Question# 5
The stopping potential of a certain photocell is 6.0 V. What is the kinetic energy given to the electrons by the incident light? Give your answer in both joules and electron volts. Marks = 6 (Value of charge on electron is -1.60×10-19C)
:::::::::::::::::::::::::::::: Wish you good luck ::::::::::::::::::::::::::::