Q.16 For the purpose of starting an induction motor, a Y/A switch is equivalent to an auto- transformer of ratio. (a) 33.3% (b) 57.7% (d) 100% (c) 73.2%
Q: How many coils must a loop have with a cross-sectional area of 0.50m? that is pulled through a…
A: E =4V, A = 0.5m2 B = 0.25T, ∆t = 1sec The induced emf in the coil is E = N.BA/∆t N = ∆t.E /BA N =…
Q: a 0.8T bar magnet is pushed through a 50.5 turn coli with an area of 0.002m2 in 3.4sec. The
A: Given No of turns = 50.5 Magnetic field B = 0.8 T Area A = 0.002 m2 Time ∆t = 3.4 sec
Q: A voltage of 2.4 V is induced in a coil when a magnet is pushed inside it. if the number of turns of…
A: according to lenz law the emf induced in a coil is given by emf=−NΔΦ/Δt ΔΦ/Δt = rate of change in…
Q: At the instant a current of 0.80 A is flowing through a coil of wire, the energy stored in its…
A:
Q: A very large, superconducting solenoid such as one used in MRI scans, stores 1.00 MJ of energy in…
A:
Q: Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will…
A:
Q: It is desired to construct a solenoid that will have a resistance of 5.45 Ω (at 20°C) and produce a…
A: Given that, Resistance = 5.45 Ω Temperature = 200C Magnetic field = 4.00×10-2 T Current = 4.80 A…
Q: f the magnitude of the magnetic induction is less than that in a vaccum within a solid, so, this…
A: The diamagnetic materials have very weak magnetism. The magnitude of the its magnetic induction is…
Q: stimate the diameter of the bore (hole where patient enters) an MRI machine should be to have a…
A: magnetic field inside the coil B=uiN/2r where r=radius of the bore N=no. of turns=4036…
Q: It is desired to construct a solenoid that will have a resistance of 5.45 (at 20°C) and produce a…
A:
Q: Suppose that when you move a magnet through a 34.5-turn coil at a certain speed, a voltage of 81.8…
A: According to Faraday's second law Induced emf = rate of change of magnetic flux
Q: A generator has a 0.054 T magnetic field and a coil with 51 turns each with an area of 0.218 m2..…
A: Given: The strength of the magnetic field is 0.054 T. The number of turns is 51. The area of the…
Q: In a stationary field coil of 500 turns calculate the induced voltage produced by the following flux…
A:
Q: A 2000 winding coil has a length of 20mm and a winding thickness of 5mm. If the coil carries a…
A: Given: N=2000, L= 20mm, t=5mm, I=5mA = 0.005A
Q: A single loop of wire with a radius of 7.5 cm rotates about a diameter in a uniform magnetic field…
A:
Q: Below is a Motional EMF problem with a sliding, conducting bar connecting a wire loop within a…
A: Given:- The velocity of the bar V = 25.0 m/s The magnetic field B = 0.640 T The resistance in the…
Q: How many turns is required for a coil with a diameter of 48 mm to induce 12 v of electricity when…
A: given that,Diameter, d=12 mm=0.12 memf reduced=12 V∆B=310 T∆t=0.2 secθ=18°
Q: A generator uses loops of area 0.239 m^2, rotating 373 rad/s in a 0.0639 T magnetic field. How many…
A:
Q: A V = 30 mV battery is connected to a single turn loop of dimensions a = 13 cm by b = 12.5 cm has a…
A: The given values are, V=30 mV=0.030 VA=a×b=13 cm×12.5 cm=13×10-2 m×12.5×10-2 m=162.5×10-4 m2R=15.5…
Q: A very tall cylindrical transformer in a power station has a radius of 0.48 m and carries a uniform…
A:
Q: .A 110 V direct current motor generates a back-emf of 98 V when it runs at full speed. If the…
A: Given Data: Applied voltage, V=110 V Back-emf, ε=98 V Resistance, R=10 Ω ⇒Motor runs at full speed.
Q: It is desired to construct a solenoid that will have a resistance of 4.20 N (at 20°C) and produce a…
A: SOlution: Given that R =4.2 Ohm B= 4x10-2 T I = 3.95 A d = 0.5 mm r = 1 cm copper resistivity =…
Q: 10 and 11 please
A: 10. When an emf is produced in a coil because of the change in current in a coupled coil, this…
Q: A transformer has 80 turns in its primary coil and 50 turns in its secondary coil. If the current in…
A:
Q: A transformer transfers 220,000 W of the 250,000 W of energy supplied to it. How efficient is the…
A: Given value--- input power = 250000 W. output power = 220000 W. We have to find--- efficiency of…
Q: A metal strip 9.11 cm long, 0.864 cm wide, and 0.660 mm thick moves with constant velocity through a…
A:
Q: A uniform magnetic field is perpendicular to the plane of a circular loop of diameter 10 cm formed…
A: The area of cross section of the wire is The area of the loop is
Q: For the following DC motor, in what direction will the loop spin? The loop will spin…
A:
Q: It is desired to construct a solenoid that will have a resistance of 4.45 Ω (at 20°C) and produce a…
A:
Q: Consider a solenoid with a diameter 0.04 m, length 7.6 m, 55 turns, and total resistance 0.6 Ω. The…
A:
Q: How many coils must a loop have with a cross-sectional area of 0.50m? that is pulled through a…
A:
Q: 18. För an a.c generator of maximum value 100 volt, the av quarter or a half cycle equal .. Volt..…
A:
Q: A flat circular coil of 1 cm radius is rotated at 10 revolutions per second about an axis that is…
A: Given data The radius of the flat circular coil is: r = 1 cm = 0.01 m The number of revolution by…
Q: It is desired to construct a solenoid that will have a resistance of 4.95 2 (at 20°C) and produce a…
A: It is desired to construct a solenoid that will have a resistance of 4.95 (at 20°C) and produce a…
Q: It is desired to construct a solenoid that will have a resistance of 4.95 Ω (at 20°C) and produce a…
A: Given, Resistance R = 4.95 Ω Magnetic field B = 4.00 ✕ 10-2 Tesla Current I = 4.75 Amp Resistivity…
Q: The rod shown below moves to the right on essentially zero-resistance rails at a speed of v = 2.9…
A: For finding the current:
Q: 39. A 110 V direct current motor generates a back-emf of 98 V when it runs at full speed. If the…
A: Dear student, Since both questions are different as per guidelines we can author only first one…
Q: It is desired to construct a solenoid that will have a resistance of 5.30 Ω (at 20°C) and produce a…
A:
Q: 5. A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a…
A: Answer:- (c) 0.5 s Given Number of turns (N) = 500 Induced voltage (E) = 60 V Magnetic flux (d…
Q: is desired to construct a solenoid that will have a resistance of 5.60 n (at 20°C) and produce a…
A: Given:Part(B)Current,I=3.10 AMagnetic field,B=4×10-2 TThe number of turns,N=1029 turnsNow,Magnetic…
Q: It is desired to construct a solenoid that will have a resistance of 4.15 2 (at 20°C) and produce a…
A: Given that--- resistance of solenoid (R) = 4.15 ohm Magnetic field (B) = 4*10-2 T Current I = 5.00…
Q: At what angular velocity in rpm will the peak voltage of a generator be 480 V, if its 500-turn, 8.00…
A: Using the equation for the peak emf, ε=NABωω=εNAB=εNπd24B
Q: 15) A metal bar with length L = 0.60 m ,mass m = 100 gram, and resi stance R = 15 N is placed on…
A: Given : L = 0.60 m m = 100 g = 0.1 kg R = 15 Ω Φ = 70° B = 1.6 T g = 10 m/s2
Step by step
Solved in 2 steps with 2 images
- A motor in normal operation carries a direct current of 0.850 A when connected to a 120-V power supply. The resistance of the motor windings is 11.8 . While in normal operation, (a) what is the back emf generated by the motor? (b) At what rate is internal energy produced in the windings? (c) What If? Suppose a malfunction slops the motor shaft from rotating. At what rate will internal energy be produced in the windings in this case? (Most motors have a thermal switch that will turn off the motor to prevent overheating when this stalling occurs.)A transformer is used to charge a cell phone. The number of turns on the primary coil is 600. The voltage input is 120 V and the output needs to be 9.0 V. The output current is 40 milliamperes. What is the number of turns on the secondary coil and the current in the primary. Assume the transformer is 100% efficient. The number of turns on the secondary coil is 45 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 8000 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 45 and the current in the primary is 3.0 milliamperes. The number of turns on the secondary coil is 8000 and the current in the primary is 3.0 milliamperesA phone charger contains a step-down transformer with input voltage of 120V. The required charging current for the phone is 12 A with voltage of 12 V. What should the ratio of the number of turns in the primary coil to the number of turns in the secondary coil in the transformer? O (Np/Ns)= 21 O (Np/Ns)= 6 O (Np/Ns)= 2 O (Np/Ns)= 10 O (Np/Ns)= 19
- For the circuit in the figure, at t = 0 the switch S is closed with the capacitor uncharged. If C = 56 µF, ɛ = 80V, and R = 4 kQ, what is the charge (in mC) on the capacitor when the current in the circuit is | = 8.6 mA? %3D S C Select one: O A. 2.55 В. 3.09 Ос. 6.41 O D. 4.63 O E. 1.38The severity of an electrical shock depends on all of the following except: O The duration of the contact with the source of the shock. O Whether the shock is AC (alternating current) or DC (direct current). Whether the source of the electricity is a battery or a DC power supply. O The path the current takes through the body.Two resistanceless rails rest 42 cm apart on a 6.6o ramp. They are joined at the bottom by a 0.68 Ω resistor. At the top, a copper bar of mass 0.034 kg (ignore its resistance) is laid across the rails. The whole apparatus is immersed in a vertical 0.35 T field. What is the terminal (steady) velocity of the bar as it slides frictionlessly down the rails?
- A dc motor with its rotor and field coils connected in series has an internalresistance of 2.00 Ω. When running at full load on a 120 V line, itdraws a 4.00 A current. What is the motor’s efficiency?W S X H 8. A pair of power transmission lines each have 2.50- resistance and carry 650 Amp. If the primary voltage of the 10:1 step-up transformer is 2.4 kV, calculate the input voltage of the step-down transformer at the other end. x 22.375 kV 33.237 3 E D C $ 11 FLOW R 5 T To G V 6 tv♫ON MacBook Air B Y & 7 H N 8 /A M K MOSISO V. 1 1 command5.50 kN 30.0 µF At t=0.0 s, the switch S is closed with the capacitor initially uncharged. At t=0.165 s, the current is I=3.21 mA. Determine the value of E in volts. Type your answer...
- For the circuit in the figure, at t = 0 the switch S is closed with the capacitor uncharged. If C = 55 µF, ɛ = 80V, and R = 4 kQ, what is the charge (in mC) on the capacitor when the current in the circuit is | = 6 mA? %3D S C: R Select one: O A. 3.08 12 B. 5.12 C. 5.72 OD. 3.60 OE. OE. 1.93 +The rod shown below moves to the right on essentially zero-resistance rails at a speed of v = 2.9 m/s. 5.0 N 4.0 cm If B = 0.61 T everywhere in the region, what is the current (in mA) through the 5.0 O resistor? Does the current circulate clockwise or counterclockwise? o clockwise o counterclockwiseThe bolt of lightning depicted in the figure passes 200 m from a 90 turn coil oriented as shown. If the current in the lightning bolt falls from 7.00x106 A to zero in 9.9 μs, (b) what is the average voltage induced in the coil?
