Home
Class 12
PHYSICS
A small insect crawls in the direction o...

A small insect crawls in the direction of electron drift along bare copper wire that carries a current of 2.56A. It travels with the drift speed of the electron in the wire of uniform cross-section area `1mm^2`Number of free electrons for copper =`8 times 10^28// cc` and resistivity of copper = `1.6 times 10^-8 Omega m`
How much time would the insect take to crawl 1.0 cm if it crawls at the drift speed of the electron in the wire?

A

50sec

B

5sec

C

5000sec

D

None of these

Text Solution

AI Generated Solution

To solve the problem, we need to find the time it takes for the insect to crawl 1.0 cm at the drift speed of the electrons in the copper wire. We will follow these steps: ### Step 1: Convert the area from mm² to m² The cross-sectional area of the wire is given as 1 mm². We need to convert this to square meters for our calculations. \[ 1 \, \text{mm}^2 = 1 \times 10^{-6} \, \text{m}^2 \] ...
Promotional Banner

Topper's Solved these Questions

  • DC CIRCUIT

    VMC MODULES ENGLISH|Exercise LEVEL-2 DAILY TUTORIAL SHEET-2|10 Videos

  • DC CIRCUIT

    VMC MODULES ENGLISH|Exercise LEVEL-2 DAILY TUTORIAL SHEET-3|10 Videos

  • DC CIRCUIT

    VMC MODULES ENGLISH|Exercise LEVEL-1 DAILY TUTORIAL SHEET -5|15 Videos

  • CURRENT ELECTRICITY

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-F|10 Videos

  • DYNAMICS OF A PARTICLE

    VMC MODULES ENGLISH|Exercise JEE Advance (Archive) Level - II (SINGLE OPTION CORRECT TYPE )|31 Videos

Similar Questions

Explore conceptually related problems

A uniform copper wire having a cross sectional area of 1 mm^(2) carries a current of 5 A. Calculate the drift speed of free electrons in it. (Free electron number of density of copper =2 times 10^(28)//m^(3) .)

Calculate the drift speed of the electrons when 1A of current exists in a copper wire of cross section 2 mm^(2) .The number of free electrons in 1cm^(3) of copper is 8.5xx10^(22) .

What length of a copper wire of cross-sectional area 0.01 mm^2 will be needed to prepare a resistance of 1 kOmega ? Resistivity of copper = 1.7 xx 10^(-8) Omega m .

When a current is established in a wire, the free electrons drift in the direction opposite to the current, Does the number of free electrons in the wire continuously decrease?

Calculate the resistance of 1 km long copper wire of radius 1 mm. (Resistivity of copper is 1.72 xx10^(-8) Omega m ).

There is a current of 40 ampere in a wire of 10^(-6)m^(2) are of cross-section. If the number of free electron per m^(3) is 10^(29) then the drift velocity will be

A copper wire has a diameter of 0.5 mm and a resistivity of 1.6 xx 10^-6 Omegacm . How much of this wire would be required to make a 10 Omega coil ? How much does the resistance change if the diameter is doubled ?

Find the average drift speed of free electrons in a copper wire of area of cross-section 10^(-7) m^(2) carrying current of 1.5 A and having free electron density 8.5 xx 10^(28) m^(-3)

Find the average drift speed of free electrons in a copper wire of area of cross-section 10^(-7) m^(2) carrying current of 1.5 A and having free electron density 8.5 xx 10^(28) m^(-3)

Calculate the electric field in a copper wire of cross-sectional area 2.0mm^(2) carrying a current of 1A .The resistivity of copper =1.7xx10^(-8)(Omega)m .