Problem 1. AC Circuits-four short questions. (a) Explain the difference between instantaneous, peak, and RMS quantities, and give some examples of when it is appropriate to use each one. (b) For electrical power, (instantaneous) p is only true sometimes. Give a situation where it works, and a situation where it fails, and explain why it fails. = iv is always true, but (average) Pavg Irms Vrms (c) AC circuits gained prevalence over DC circuits for power distribution because of the ease of transforming between high and low voltage. Explain why a transformer (which uses magnetic induction between two coils of wire) works for AC but not for DC. (d) Suppose an electrical distribution line has a resistance of 1 ohm and needs to deliver 1 MW (megawatt) of electrical power. Is it more efficient to deliver that power at Vrms at Vrms question. (Hint: Actual distribution lines are high-voltage, so...) = 120 V or 120 kV? Calculate the power wasted as heat in the distribution line to answer the

Q: 3. A dentist's mirror is placed 1.0 cm from a tooth. The enlarged image is located 7.5 cm behind the…

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Q: What is the position and nature of image formed by lens combination shown in figure? (Where, f1 and…

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Q: How do you identify that any lens which forms an image has a positive or negative focal length?

A: How do you identify that any lens which forms an image has a positive or negative focal length?

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Q: Suppose you are looking at your reflection in a shiny round holiday tree ornament. (a) If you are…

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Q: In a coil with radius of 6 cm and 400 turns, there is a magnetic field leaving in a direction…

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Q: Specify Maxwell's equations in free space.

A: The Maxwell's equations, can be given in general 1)∇→.E→=ρε02)∇→.B→=03) ∇→×E→=-∂B→∂t4) ∇→×B→=μ0…

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A: Given that, A ball is dropped from rest 3.20 m directly above the vertex of a concave mirror having…

Q: C object D f E A В

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Q: A tank has a volume of 0.5 m³ and contains 10 kg of an ideal gas having a molecular weight 24. The…

A: Given:Volume of tank, V = 0.5 m3mass of the gas, m = 10 kgmolecular mass of the gas, m = 24…

Q: If an object is placed 15 cm from a concave mirror with a radius of curvature of 20 cm, what are the…

A: Object distance, radius of curvature are given and image characteristics are asked.

Q: Both sides of a lens will have a focal point. True or False

A: Light rays that are parallel to the optical axis will meet on the focal point .Light rays that are…

Q: Your mass is 61.8 kg, and the sled s mass is 20.9 kg. You start at rest, and then you jump off the…

A: mass of person, M=61.8 kg Sled mass, m= 20.9 kg Sled speed, vs = 5.49m/s

Q: solve the following equations for x: d^2=(x)^2+(y)^2 v^2=v^2o+2a(x-xo)

A: To solve for x : A) d2 = x2 + y2

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Q: If all the energy from a 93 W light bulb is emitted, on average, at 530.0 nm, how many 530.0 nm…

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Q: Calculate the magnification of this image. Original Object 6 cm 4 crm Image on Screen 30 cm 20 crm

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Q: Draw a ray diagram & draw the image formed.

A: The lens given in the problem is a concave lens, which forms only virtual images of objects placed…

Q: 13. Atwood's machine is shown in the diagram. They (one is 3 kg and the other is 5 kg) were attached…

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Q: In a certain region, J = 6e-3* sin(wt – 2x) a, + 10e-*cos (wt – 5x)a, A/m Find a) Pv b) Е c) D

A: It is given that the current density:J→=6e-3xsinωt-2xy^+10e-xcosωt-5xz^ A m-1 The current density…

Q: Find the image distance for an object placed 10cm in front a convex lens with focal length 7cm

A: Given  For convex lens,  u= -10 cm , f = 7 cm  We have to find, image distance  v = ?

Q: A man pushes on a piano with mass 180 kg; it slides at constant velocity down a ramp that is…

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Q: How do you determine the focal length of both a convex and concave lens?

A: Convex lens:             An optical lens is generally made up of two spherical surfaces. If those…

Q: An object 3cm high is place 20 cm from a concave mirror of radius 24 cm. Find d) the magnification…

A: Given, radius of concave mirror = -24 cm  object distance = -20 cm

Q: Is the image real of virtual?

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Q: 49. ssm A hot-air balloon is rising upward with a constant speed of 2.50 m/s When the balloon is…

A: Given: A hot-air balloon moving in upward with speed 2.50 m/s After reaching at height 3 m above…

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Q: 1. If 528 kJ of heat are added to 2.25 kg of helium at constant volume process when the initial…

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Q: Consider the compound optical system shown in the diagram, where two thin lenses of focal lengths…

A: Given : f1 = 7.5 cm f2 = 35 cm d = 25 cm

Q: The nickel's image in the figure below has thrice the diameter of the nickel when the lens is 2.62…

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Q: For the situation shown in Fig, is the image distance s′ positive or negative? Is the image real or…

A: Given, An object , image and rays emerging from one medium to another medium

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Q: Algae

A: Given: Power Plant Type: Algae

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A: From the previous answers we got the velocity function as:

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Q: as each experiment will be ass that is roughly 10%-20% There is no need to be terr

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A: Ques:1.If you move the convex lens away from the object. What happen to the image ? 2.How far was…

Refraction of Light

Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.

Angle of Refraction

Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.

Index of Refraction of Diamond

Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.