After being closed for a long time, the switch S in the circuit shown in the figure below is thrown open at  t = 0.  In the circuit,   = 24.0 V,   RA = 4.50 kΩ,   RB = 6.70 kΩ,  and  L = 665 mH.   (a) What is the emf across the inductor immediately after the switch is opened?  V (b) When does the current in the resistor RB have a magnitude of 1.00 mA?

Q: four blocks on springs, with the spring constant of the spring and the mass

A: Four spring-mass systems with spring constant and mass. Note: 1 N=1 kg·m/s2 1 Hz=1 s-1 Find: Which…

Q: Problem 2: A proton moving at 2.00x106 m/s enters a region of magnetic field with B = 5.00T that is…

A:

Q: A student team is to design a human-powered submarine for a design competition. The overall length…

A: For making dynamic similarity of model: Rem=RepρmVmLmμm=ρpVpLpμpVm=ρpVpLpμp{μmρmLm}

Q: 3. A rocket has a mass of 1.00 x 105 kg. Its engines develop a thrust of 2.50 x 106 N, what is the…

A:

Q: From the perspective of the first law of thermodynamics, is it possible for a heat engine to have an…

A: No, it is not possible for a heat engine to have an efficiency greater than 1 according to the first…

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A: Given Data: Temperature of the lounge = 70o C.Temperature of the coffee (T1(0)) = 220o C. To…

Q: The object-lens distance for a certain converging lens is 400 mm. The image is three times the size…

A: The distance of the object from the lens is 400 mm. The size of the image is three times that of the…

Q: ||1|1 fub A Bulb A is removed from its socket, Bulb B will not light up. True False

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Q: A diverging (concave) LENS can form images that are?

A: A diverging (concave) lens. Find: Characteristic of image produced by concave lens.

Q: Determine the current I flowing through a solenoid, if the magnetic flux inside its core is found to…

A: We have given: Φ = 2.90 x 10-4 Wb radius of solenoid, r = 20 cm = 0.25 m Number of turns per meter,…

Q: The capacitor will fail (short out and burn up) if the electric field between the plates exceeds 219…

A: Dielectric constant is k=4.16 Area of capacitor plates is A=0.0461 m2 Distance between capacitor…

Q: A converging lens has a focal length of 15.5 cm. An object with a height of 6.1 cm is placed 36.4 cm…

A: The focal length of the converging lens is 15.5 cm. The height of the object is 6.1 cm. The distance…

Q: You need to design a pendulum that swings through a small angle with a period of 7.0 seconds. Part…

A: Time period of simple pendulum, T=7 s

Q: Part A What is the conductance of a 1.0-mm-diameter, 10-cm-long blood vessel filled with blood?…

A: The diameter of the conductor is 1.00 mm. The length of the blood vessel is 10 cm. The potential…

Q: Let's suppose mass changes smoothly from 5 kg to 2 kg in 10 s. During this same interval of time the…

A: mass changes smoothlylet initial time be t=0 sthen interval is t=10 smass goes from 5 kg to 2…

Q: We are given the following data about the speed of a vehicle with time: Time (1) Speed (v) 0 5.2 5…

A: Velocity of vehicle at t = 15: v15 = 6 Velocity of vehicle at t = 10: v10 = 8.3 Forward difference…

Q: Instead of buying a capacitor, you decide to make one. Your capacitor consists of two circular metal…

A:

Q: Which picture looks like the ray diagram for a convex mirror? A) B) U

A:

Q: A 320-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,040 A.…

A: see below handwritten solution

Q: When the light ray illustrated in the figure below passes through the glass block of index of…

A:

Q: A 2150 kg drawbridge, 8.74 m long, is held up by a chain attached to the end. The chain makes a 51.0…

A: See below as handwritten

Q: A current of 500 A flows in a 30 km long copper transmission line (diameter 1.0 cm). a) What is the…

A:

Q: Fnd the 1 = 10 A 12 = 13 = 14 = ΤΩ 13 10 Ω Μ ΙΚΩ Μ I 100 ΚΩ units units units units

A:

Q: For a certain optical medium the speed of light varies from a low value of 2.20 × 108 m/s for violet…

A: The speed of the violet light in a medium is 2.20×108 m/s. The speed of the red light in a medium is…

Q: An iron bolt of mass 60.0 g hangs from a string 30 cm long. The top end of the string is fixed.…

A: Given, Mass, m=60.0 g=0.060 kg, string length, l= 30 cm= 0.30 m, and displacement, d= 28 cm= 0.28 m.

Q: Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the…

A: The distance of the charge A from the given spot is rA= 0.178 m The distance of the charge B from…

Q: One 50.0 kg cart is lifted straight up 9.0 m above the ground. An identical cart is pulled up a…

A: Given mass of cart = 50.0 kg this cart is lifted straight up by 9.0 m second identical cart is…

Q: 3. For each case below, what is the (scalar) component of vector a in the direction of the vector ?…

A: The (scalar) component of the vector a→ in the direction of the vector v⇀ is given by, a→·v→v→=a→v→…

Q: kg rod is 0.625 m long, and attached at one wall with a hinge, so it can be rotated up vn. How much…

A:

Q: A 560 g yo-yo is swung in a vertical circle, on a string that is 1.3 m long. If the string can…

A: Write the given values with the suitable variables. m=560 g=0.560 kgr=1.3 mTmax=25 N Here, m, r, and…

Q: In the circuit shown in the figure below, let L = 2.20 H, R = 6.80 Ω, and  = 120 V. What is the…

A:

Q: A 0.530 kg ball is attached vertically to a spring with a spring constant of 16.0 N/m. The ball is…

A:

Q: Consider the circuit shown in the figure. (Assume that C₁ = 3 µF, C₂ = 6 µF, C3 = 5 µF, and C₁ = 4…

A:

Q: A magnetic field is oriented at an angle of 57 ∘ to the normal of a rectangular area 4.8 cm by 6.6…

A:

Q: When you polarize a neutral dielectric, the charge moves apart a bit and the total surface and…

A: The movement of the charges in the neutral dielectric when they are placed in the electric field is…

Q: Newton's Law of Inertia states that ________.

A: Newton's 1st law also called as Law of inertia states that an object at rest and a moving object…

Q: AM radio signals have frequencies between 550 kHz and 1600 kHz (kilohertz) and travel with a speed…

A: Frequencies of AM radio signals as f1=550 kHz and f2=1600 kHz Speed of wave signals is v=3×108 m/s…

Q: A box is pulled with a force of 75 N at an angle of 45 degrees for a total distance of 15 m... a)…

A:

Q: Consider a refracting prism shown below. The face opposite the apex (top of the prism) is called the…

A: The bending of light, when it travels from one medium to another is called refraction. The ratio of…

Q: How does the ground temperature in sunlight with CO2 compare with the ground temperature in sunlight…

A: The ground temperature in sunlight with CO2 compare with the ground temperature in sunlight without…

Q: What potential difference is required to charge a 30.0 F capacitor with 150.0 C? i V

A: Capacitance of the capacitor is C = 30.0 F  Charge is Q = 150.0 Coulombs

Q: A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is -5 dB per km and cable…

A:

Q: A traveling electromagnetic wave in a vacuum has an electric field amplitude of 77.3 V/m. Calculate…

A: Solution: Given: E0 = electric field amplitude = 77.3 V/m A = area on which EM wave is falling =…

Q: Find the magnitude and direction of the electric force exerted on the 6.00 nC charge.

A:

Q: Use dimensional analysis to show that velocity in Equation 1 is measured in meters per second.…

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Q: You want to produce a magnetic field of magnitude 5.50x10-4 T at a distance of 4.00×10-2 m from a…

A:

Q: ul

A: We have given a long current-carrying wire with current…

Q: Light rays in a material with index of refrection 1.39 can undergo total internal reflection when…

A: Given Data: Index of refraction of the first material (n1) = 1.39.Critical angle θc = 73.7o. To…

Q: (a) An electron moves through a uniform electric field E (2.00 +4.605) V/m and a uniform magnetic…

A:

Q: Part A What is the magnetic field strength at point 1? Part C What is the magnetic field strength at…

A: Current is I = 14 A

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.