The AC voltage source is connected to an inductor and a resistor in series. If the frequency of the source is increased the current in the circuit will _________.
Answers
Answer:
If the frequency of the source is increased the current in the circuit will decrease.
Explanation:
The current through the circuit is given as;
Where;
V is the voltage in the AC circuit
Z is the impedance
Where;
R is the resistance
is the inductive reactance
= ωL = 2πfL
where;
L is the inductance
f is the frequency of the source
Finally, the current in the circuit is given as;
From the equation above, an increase in frequency (f) will cause a decrease in current (I).
Therefore, If the frequency of the source is increased the current in the circuit will decrease.
Related Questions
A 2.9-kg cart is rolling along a frictionless, horizontal track towards a 1.4-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is +3.9 m/s, and the second cart's velocity is -1.2 m/s. (a) What is the total momentum of the system of the two carts at this instant? (b) What was the velocity of the first cart when the second cart was still at rest?
Explain why ultra-high voltages are used to carry electricity over transmission lines.
Calculate the displacement for an object traveling at a constant velocity of 32 m/s for 4 s.
9.) The fastest land animal, the cheetah, can accelerate from 0 m/s to 33 m/s in 3 seconds. What is the cheetah's acceleration?
B. Improved strength across the entire range of motion
C. Improved joint flexibility
D. Motivational
Answers
Answer: C. Improved joint flexibility
Explanation:
Isometric exercises are the exercises which involves the contraction of particular muscles or group of muscles. In these exercises the muscles do not change their length and the joints does not move. These are the exercises which are done in one position. These exercises are performed in order to obtain strength during training exercises during which the muscle length and joint angles do not basically change. These exercises are high intensity exercises and contributes to the building of muscles and burning of fat.
On the basis of the above information, A. Rapid strength improvement is the correct option.
Final answer:
The primary advantage of isometric exercise is rapid strength improvement in a specific area, not necessarily improved flexibility or range of motion.
Explanation:
The best answer that describes an advantage of isometric exercise is A. Rapid strength improvement. Isometric exercises are often used for rehabilitation and building strength, as they involve the contraction of a specific set of muscles in a static position. This type of exercise does not involve the muscle changing length or the joint angle changing, which allows for an increase in strength in a very focused manner.
This does not necessarily mean that isometric exercises enhance joint flexibility (C) or improve strength across the entire range of motion (B) as the movement is static. The motivation aspect (D) can differ from person to person, but it's not a direct physical benefit of isometric exercises.
Learn more about isometric exercise
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Answers
Composition of a rock is determined by the percent of constituent of minerals and elements contained within it.
Explanation:
The composition of a rock is decided by the % of the constituent minerals and components contained inside it.
The minerals that form up rocks have outlined chemical compositions and rigid atomic structures. once daylight strikes the rock's surface, the composition and atomic structure of the various minerals management the wavelengths they absorb or replicate.
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Answer:
if the friction was removed from the ramp, the acceleration would drasticly increase, making it hard to stop.
Explanation:
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The barge will sink until the sum of the forces on it equals zero.
The two forces are the weight of the barge (with sand) and the buoyancy force, the force exerted by the liquid (fresh water) on the barge.
Then, weight of the barge with sand = m*g = 600 kg * g
Buoyancy force = density of the fluid * Volume of displaced fulid * g
Then, m*g = density of the fulid * Volume of displaced fluid * g
m*g = df * Vf * g
m = df*Vf => Vf = m/df = 600 kg / 1 000 kg/m^3 = 0.6 m^3
The volume of the displaced fluid equals the volume of the portion of the barge sinked, wich is the area of the rectangular base times the depth to which it sinked>
7m*2m*H = 0.6 m^3 => H = 0.6 m^3 /[14 m^2] = 0.043 m = 4.3 cm
Answer: 4.3 cm
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Answers
Acceleration=9.8m/s2;
Mass=15kg
If the input force is less than the output force, then the input distance must be greater than the output distance.
If the input force is greater than the output force, then the input distance must be greater than the output distance.
If the input force is less than the output force, then the input distance must be the same as the output distance.
If the input force is equal to the output force, then the input distance must be greater than the output distance.
Answers
Answer:
If the input force is less than the output force, then the input distance must be greater than the output distance.
Explanation:
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