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How would resistance r depend on cross section and length of the material?
Resistance R =p(L /A)i,e Resistance(R) of a conductor will be directly proportional to its length(L) ==> if the length of the conductor increases its resistance also will increase.i,e Resistance(R) of a conductor is inversely proportional to its cross section area(A) ==> if the Area of the conductor increases its resistance also will decrease.
When air resistance balances the weight of an object that is falling does the velocity slowly decrease?
-- When the forces on an objerct are 'balanced' ... meaning they add up to zero ...the object moves with a constant speed in a straight line.-- When the object's weight is greater than the force of air resistance, it keepsaccelerating downward.-- When the force of air resistance is equal to the object's weight, the forces on itare balanced, they add up to zero, and the object's speed becomes constant.-- If you started by throwing the object down at a high speed, so that the force ofair resistance was greater than its weight, its speed would decrease to the pointwhere the force of air resistance was equal to its weight. At that point, the forceson it would be balanced, they would add up to zerro, and its speed would becomeconstant.
Does potential energy decrease with height?
if the body is moving upward its potential energy would decrease as its kinetic energy would increase
What is the ration to resistance force to effort force?
The effort required would be proportional to the resistance.
A lenght of cirular wire as a resistance of 1 ohms if its the diameter was double its resistance woul be.?
Its resistance would be half , 0.5 ohms is the answer.
What causes peripheral resistance?
Peripheral resistance is the force against blood flow. In most cases, an increase in peripheral resistance would be caused by an increase in vasoconstriction, which would decrease blood flow. Other factors can influence vasoconstriction, such as circulating angiotensin II levels, cortisol levels, drugs such as cocaine and other adrenergic agonists, blood volume, atherosclerosis, emboli, renal diseases and increased intra-cranial pressure. An increase in blood pressure will also be caused by vasoconstriction and the mentioned factors.
Would vasoconstriction of the renal arteries decrease blood flow to the kidneys?
Yes. If you constrict the afferent arteriole then renal blood flow will decrease.
What would decreased peripheral resistance to blood flow?
Vasodilation and decreasing blood viscosity
How would you explain what vasoconstriction mean?
Vasoconstriction is the narrowing of blood vessels.
Due to heat would the resistance in non-ohmic material decrease or increase?
Increase
How does vasoconstriction effect your body temperature?
Vasoconstriction (from "vaso-" meaning vessel) is constriction of the blood vessels. The opposite of vasoconstriction is vasodilatation, which is the relaxation of blood vessels. Vasoconstriction causes the radius of blood vessels to decrease, while vasodilatation increases radius.Blood flow through a vessel can be modeled as the flow of fluid through a pipe. Fluid flow through a pipe is directly proportional to the fourth power of pipe radius. As radius decreases, blood flow decreases, and vice versa. So vasoconstriction and vasodilatation can be used to regulate flow through a blood vessel.Peripheral blood vessels are usually considered those not in the core of the body and not those that supply skeletal muscles. A common example is the blood vessels of the skin. So peripheral vasoconstriction and vasodilatation control the amount of blood flow to the skin.Skin blood flow is a critical component of temperature regulation. To dissipate heat, warmblooded animals direct blood flow to the skin so it can be transferred to the surrounding environment. So if you were to exercise (which produces heat) or enter a steamy sauna, your skin blood vessels would vasodilate to direct that warm blood towards the skin surface so heat can be dissipated. Conversely, if you were to get cold for any reason, peripheral vasoconstriction would occur which would shunt blood away from the skin to help conserve heat and prevent its dissipation to the environment.
Is resistance box connected in series or parallel?
It depends on what you want to accomplish. If you want to decrease the resistance in a circuit, you would place the box in parallel to some other resistor. If you want to increase the resistance in a circuit, you would place the box in series.
What will happen to the brightness of blub connected in series with a solenoid with a source of dc?
THE brightness would decrease as solenoid would have some resistance.
Does the current ina circuit increase with increase in temperature?
Resistance increases as temperature increases. If Voltage is held constant then according to Ohm's Law Voltage = Current x Resistance then current would decrease as resistance increases.
How is current related to resistance in a circuit?
Ohm's law: voltage is current times resistance. Restating this; current is voltage divided by resistance, so increasing resistance would decrease current.
Why does power decrease when resistance increases?
First, this statement stands as long as voltage is constant. If you held the current constant then power would increase as resistance increases.V=IR. For a fixed voltage if you increase the resistance (R) then the current (I) will decrease - following the formula.Power = VI so as the resistance increases the value of VI (power) decreases as V is constant and I gets smaller.Therefore the power is decreasing as the resistance increases (when voltage is held constant).Hope this helps.
Is Watt Increase in series Connection Off Two Resistor?
No. The power (in watts) would decrease, due to the greater effective resistance.
