Compute the resistance in ohms of a lead block 15 cm long and 0.10 cm2 in cross-sectional area. (ρ = 2.2 x 10-5 ohm-cm)

Answers

Answer 1

Answer: Resistance of a wire is defined as the measure of how difficult an electric current will pass through a conductor. The longer the wire, the greater the resistance. Resistivity, on the other hand, is an intrinsic property depending on the material to which the current passes. The formula for resistance in terms of resistivity is:

R = pL/A

where:
R = resistance
p = resistivity
L = length
A = cross-sectional area

This gives a resistance of 3.3x10^-3 ohms

Answer 2

Answer:

Answer: The resistance of a lead block is $330\Omega$

Explanation:

Resistance is defined as the difficulty of flowing of electric current through a substance. It is directly proportional to the length of the wire and inversely proportional to the area of cross section of the wire.

Mathematically,

$R\propto (l)/(A)$

Removing the proportionality sign, we get:

$R=\rho (l)/(A)$

Where,

$\rho$ = Resistivity of the wire = $2.2* 10^(-5)\Omega cm$

R = Resistance of the wire = ? ohm

l = Length of the wire = 15 cm

A = Area of cross-section of the wire = $15cm^2$

Putting the values in above equation, we get:

$R=(2.2* 10^(-5)\Omega cm* 15cm)/(0.10cm^2)$

$R=330\Omega$

Hence, the resistance of a lead block is $330\Omega$

Related Questions

Please help me find the answers!
Which does more work, a force of 500 N moving through 10 m or a force of 100 N moving through 40 m?
Emilio's teacher told his class that a controlled experiment's results are valid only if one factor in the experiment is changed and all the other factors remain constant. Why is this statement true?Changing several different factors in an experiment takes too much time. Changing several different factors in an experiment takes too many controls. When only one factor is changed, you don't need to use a control. When only one factor is changed, you can be more certain that it caused the results.
A bowling ball has a mass of 6 kg. What happens to its momentum when its speed increases from 2 m/s to 4 m/s? A) The initial momentum is 6 kg*m/s, and the final momentum is 3 kg*m/s B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s C) The initial momentum is 12 kg*m/s, and the final momentum is 3 kg*m/s D) The inital momentum is 6 kg*m/s, and the final momentum is 12 kg*m/s
What is the difference between mass and weight

While discussing the effects of loose wheel bearings: Technician A says that vibration may occur while driving. Technician B says that the bearing may make noise. Who is correct? a. Technician A b. Neither A nor B c. Technician B d. Both A and B

Answers

Answer:

Option "D" is the correct answer i.e. Both Technicians A & B

Explanation:

Dear,

Loose wheel bearings can be caused on any machine.

The Following can be the reasons :

the machine or motor is installed improperly
the rotor(rotating part) of machine is not balanced
the cover get deteriorated with time
Bad manufacturer

So, when the bearings will be loose then the following can happen:

It will produce vibration in machine which can be judged by a vibration pen eg. SKF vibration pen
The vibration will also result in noise. You can check by
The machine winding if it is motor will burn-out.
Bush needs to be installed if the bearing runs loose.

Therefore, "D" is right.

Eric traveled east for 150 miles in 2 hours. Then he went west for 40 miles in 1 hour. What is the average velocity?

Answers

Answer:

190 is the average velocity.

Explanation:

Just add them together

What characteristics makes a substance a mineral?A. It is hard
B. It is organic
C. Its structure is crystal
D. Its a liquid, solid, or gas

Answers

Answer:c-its structure is crystal

Explanation:

A substance is called a mineral if it meets the following requirement

naturally occurring,

inorganic,

solid,

definite chemical composition,

ordered internal structure

So the definite answer is crystal structure because they have an ordered internal structure.

Hope it helps

Final answer:

A mineral is a naturally occurring, inorganic, solid substance with a specific chemical composition and a crystalline structure. Hardness may vary among minerals and they are not organic. They are solid under normal conditions on Earth.

Explanation:

A mineral is defined by several specific characteristics: it is naturally occurring, inorganic, solid, has a definite chemical composition, and has a ordered internal arrangement of atoms - structure typically crystalline in nature.

It is hard: Not all minerals are hard. The hardness of a mineral is determined by the Mohs scale. So, hardness is a characteristic but not a definition.
It is organic: This statement is untrue. Minerals are inorganic substances.
Its structure is crystal: This is true. Minerals have a crystalline structure due to the orderly, repeating pattern of their atoms.
It's a liquid, solid, or gas: This is partly correct. Minerals are solids under normal conditions on Earth.

Learn more about Mineral here:

brainly.com/question/34629711

#SPJ6

A beam of light has a wavelength of 4.5 × 10^−7meter in a vacuum. The frequency of this light is
(1) 1.5 × 10^−15 Hz (3) 1.4 × 10^2 Hz
(2) 4.5 × 10^−7 Hz (4) 6.7 × 10^14 Hz

Answers

Wavelength formula is C=λf or λ=C/f or f = C/λ, so Frequency = Velocity divided by wavelength, where C is the velocity, which is the speed of light: 3.00×108 m/sec

λ is the wavelength in meters
f is the frequency in Hertz (cycles per second)
f=3.00×108msec/4.5x10−7m=6.7x1014Hz

Newton's Third Law of Motion is often called the law of intertia.

True
False

Answers

This is False. Newton's First Law of Motion is often called the law of inertia.

A skateboarder on a half-pipe changes his velocity from 6.0 m/s forwards to 4.0 m/s backward in 5.0 s. What is the acceleration of the skateboarder?

Answers

the change in velocity is 10 m/s in 5 seconds.

sinces a = change in velocity/time

a= 10/5

a=2

Other Questions

The amount of energy in food is measured ina. watts. b. grams. c. Calories. d. kilowatts.

What energy resourse is made from the remains of fossolized sea animals

What are the divisions within a shell called

A _____ is used in a motor to switch the direction of the magnetic field created by the current.The rotating part of a motor that holds the electromagnets is called the _____.Electric current passes through the _____ and into the electromagnets in an electric motor.A motor turns _____ energy into _____ energy.