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sladkih [1.3K]
3 years ago
14

If two cells out of n number of cells each of internal resistance ’r’ are wrongly connected in series, then total resistance of

the cell is
(a) 2nr (b) nr - 4r (c) nr (d) r
Physics
2 answers:
r-ruslan [8.4K]3 years ago
3 0

Answer: D

Explanation: Hope this helps :)

raketka [301]3 years ago
3 0

Answe

nkExplancdb dcation:

lol

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Agata [3.3K]

Answer:

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6 0
4 years ago
A proton is accelerated down a uniform electric field of 450 N/C. Calculate the acceleration of this proton.
olasank [31]

Answer:

The acceleration of proton will be 431.137\times 10^8m/sec^2

Explanation:

We have given electric field E = 450 N/C

Charge on proton =1.6\times 10^{-19}C

Force on electron due to electric field is given by F=qE=1.6\times 10^{-19}\times 450=720\times 10^{-19}N

Mass of electron m=1.67\times 10^{-27}kg

Now according to second law of motion F=ma

So 720\times10^{-19}=1.67\times 10^{-27}a

a=431.137\times 10^8m/sec^2

So the acceleration of proton will be 431.137\times 10^8m/sec^2

6 0
3 years ago
the amount of surface area of the block contact with the surface is 2.03*10^-2*m2 what is the average pressure exerted on the su
CaHeK987 [17]

Complete question:

A block of solid lead sits on a flat, level surface. Lead has a density of 1.13 x 104 kg/m3. The mass of the block is 20.0 kg. The amount of surface area of the block in contact with the surface is 2.03*10^-2*m2, What is the average pressure (in Pa) exerted on the surface by the block? Pa

Answer:

The average pressure exerted on the surface by the block is 9655.17 Pa

Explanation:

Given;

density of the lead, ρ =  1.13 x 10⁴ kg/m³

mass of the lead block, m = 20 kg

surface area of the area of the block, A = 2.03 x 10⁻² m²

Determine the force exerted on the surface by the block due to its weight;

F = mg

F = 20 x 9.8

F = 196 N

Determine the pressure exerted on the surface by the block

P = F / A

where;

P is the pressure

P = 196 / (2.03 x 10⁻²)

P = 9655.17 N/m²

P = 9655.17 Pa

Therefore, the average pressure exerted on the surface by the block is 9655.17 Pa

6 0
3 years ago
3. What would the seasons be like if Earth's orbit had the eccentricity value of Mars?
densk [106]

Answer:

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Explanation:

3 0
3 years ago
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Question 9(Multiple Choice Worth 3 points)
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Answer:

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