Все публикации

0:02:42

Wire of R=200 calculate the resistance of a wire of same material, double length and double area

0:08:32

A metal cube of side IO cm, reshaped to a wire of resistance 20. Calculate length and radius of wire

0:05:46

Calculate the radius of a wire: L= 200m, resistivity 3.14 x 10^-7, and N=2 x 10^19 electrons/s ,64V

0:04:12

A copper wire of length 30m and area 0.33x10^-6 and resistivity 1.79x10^-8. Calculate its resistance

0:03:59

If the work done to transfer a charge 5C in 1s between two points in a conductor is 100J calculate :

0:04:02

Calculate the quantity of electricity passing through a certain cross-section area of a wire:

0:03:51

From the data in the two tables, determine which device does not obey Ohm's law. And why ?

0:08:37

What happens to the reading of voltmeter when increasing variable resistance S ? Questions 15 and 16

0:04:32

PART 2: Write the mathematical relation and the equivalent to the slope for each of the following

0:07:05

PART 1: Write the mathematical relation and the equivalent to the slope for each of the following

0:03:09

Using the relation: I = V/R Explain two methods to increase the current passing the electric circuit

0:03:24

In the graph,two conductors A, B of same material and same length at constant temperature

0:08:19

Mention the physical quantities measured using the following units and deduce the equivalent units :

0:06:45

What is meant by?

0:03:39

Two wires of same length and resistance, one of is copper and the other iron, the ratio rl : rc is

0:04:23

A wire is stretched so its length increased to the double of its original length, how will R change?

0:04:34

A , B and C are three wires have same length but different diameters Which of the following true ?

0:06:14

Conductor A has twice diameter, twice length of B. What is ratio of the power in to A the power in B

0:05:14

A conductor of resistance R stretched till radius decreased to 1/2 its value. The new resistance ?

0:06:15

If a wire is stretched till its length increased by 50% from its length its resistance will increase

0:05:16

conductor of area A, L=20 m, R1=108 and another one of same material of L2=5m, area 3A, what is R2

0:05:42

If length of copper wire is doubled and its cross-section area decrease to Its half, its resistance

0:05:16

28-29-30) A charge of 1x10-8C enters magnetic field at 3x102ms-1 If the force on charge is 1.8x10-8N

0:03:45

26-27) Alpha particle in a magnetic field. A charge moves parallel to the magnetic field