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3 years ago

15

For a constant resistance, how is the voltage related to the current?

2 answers:

Komok [63]3 years ago

6 0

The answer is: <span> Voltage is directly proportional to current, so when the voltage doubles, the current doubles (V=I*R).</span>

The relationship between voltage, current, and resistance is presented by Ohm's law.

STALIN [3.7K]3 years ago

5 0

Answer:
Voltage is directly proportional to current, so when the voltage doubles, the current doubles.
Explanation:
voltage, current and resistance can be related to each other using Ohm's law which can be stated as follows:
V = IR where:
V is teh voltage
I is teh current
R is the resistance

Now, assuming that the value of R is constant, we can note that as the current increases, the voltage increases by the same value of increase and vice-versa

This means that, at constant resistance, the voltage and current are directly proportional to each other.

Hope this helps :)

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A copper rod of cross-sectional area 11.6 cm2 has one end immersed in boiling water and the other in an ice-water mixture, which

julia-pushkina [17]

Answer:

0.686 g of ice melts each second.

Solution:

As per the question:

Cross-sectional Area of the Copper Rod, A = $11.6\ cm^{2} = 11.6\times 10^{- 4}\ m^{2}$

Length of the rod, L = 19.6 cm = 0.196 m

Thermal conductivity of Copper, K = $390\ W/m.^{\circ}C$

Conduction of heat from the rod per second is given by:

$q = \frac{KA\Delta T}{L}$

where

$\Delta T = 100^{\circ} - 0^{\circ} = 100^{\circ}C$ = temperature difference between the two ends of the rod.

Thus

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Now,

To calculate the mass, M of the ice melted per sec:

$M = \frac{q}{L_{w}}$

where

$L_{w}$ = Latent heat of fusion of water = 333 kJ/kg

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3 years ago

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Answer:

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Explanation:

Given data:

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v= speed of sound

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$d_B=343\times 0.45=154.35m$

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hypotenuse=the distance b/w 2 spectators

and, the slight lines are the other 2 lines

$D^2=d_A^2+d_B^2\\D=\sqrt{188.65^2+154.35^2} \\D= 243.7m$

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