QUESTION 1 If a current of 5A flowing in a coil of inductance 0.1H is reversed in 10ms, emf induced in it is ________ volt."   a.) 10 b.) 50 c.) 1 d.) 10000

Q: A 0.7-H inductor is connected in series with a 9-ohm resistor. If the connection is energized from…

A: The inductance of the inductor L=0.7 H The resistance in the circuit R=9 Ω The time t=2.75…

Q: The resistance of a coil is 52 0. When the frequency is 80 Hz, the voltage on the coil is 72,3°…

A:

Q: If a solenoid is 10 cm long and has a radius of 1 cm, how many coils would be necessary to make an…

A:

Q: The mutual inductance between two coils is 3.25 mH. A changing current in the primary coil resulted…

A: The induced emf is given by  e= Md idt where, M is the mutual inductance, and di/dt is the rate of…

Q: A 1-H inductor is connected in series with a 6-ohm resistor. If the connection is energized from an…

A:

Q: Two coils are placed close together in a physics lab to demonstrate Faraday’s law of induction. A…

A: Change on current, dI =5 A time, t =1 ms  emf = 9 V

Q: a current of 3.3 A creates a flux of 160micro Wb in a coil of 317 turns. calculate the induced emf…

A:

Q: A transformer has a turns ratio of 2.5:1 the primary voltage is 208V what is the voltage of the…

A:

Q: QUESTION 1 The charger cord used to recharge a cell phone contains a transformer that reduces 120 V…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Two coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A…

A:

Q: Transformer 1 has a primary voltage Vp and a secondary voltage Vs. Transformer 2 has twice the…

A: Given Data: The primary and secondary voltage of transformer 1 is Vp and Vs The primary voltage of…

Q: Please design a transformer based charger works with 230V input and 5V output with N amp current.…

A:

Q: An electromagnet has a resistance of 400 ohms and an inductance of 0.64 henry. If 48 volts is…

A:

Q: Question #22. Supposed that the circuit in coil 1 is disconnected, decreasing the current from 20A…

A:

Q: The self-inductance of the circuit in the figure below is 9.60  10-8 H. Find the back emf when the…

A: Given data The self-inductance is given as L = 9.60 x 10-8 H. The rate of increase in current is…

Q: The current in one coil decreases from 4.2 A to zero in 0.80-s. A 0.035-V emf is induced in a…

A: In the given question, The current in coil 1 decreases from 4.2A to zero. in 0.80s. An emf of 0.035…

Q: 8) The resistance of a coil is 54 0. When the frequency is 80 Hz, the voltage on the coil is 75,3°…

A:

Q: The self-inductance of the circuit in the figure below is 9.10 x 10-8 H. Find the back emf when the…

A:

Q: When 9 A of AC current at 123 V flows in the primary coil of an ideal transformer, how many amps at…

A:

Q: A step down transformer produces produces a voltage of 6 volts across the sec- ondary coil when the…

A: voltage in primary, Vp = 120 V  voltage in secondary, Vs = 6 V

Q: A coil with 651 turns of wire and a cross sectional area of 0.00560 m2 is rotated about its diameter…

A: Angular velocity (w) = 2720 RPM  W = 2720×2π/60 rad/s  W = 284.69 rad/s

Q: If two coils placed next to one another have a mutual inductance of 7.50 mH, what voltage (in V) is…

A:

Q: What is the inductance of a coil whose resistance is 105 Ω if it draws 0.47 A from a 119-V, 60-Hz…

A:

Q: The flux linkage through a certain coil of 0.75 ohm resistance would be 26 mWb if there were a…

A: a) The inductance of the coil is given by,

Q: Two coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A…

A:

Q: One simple, though impractical, way to generate electrical power is shown below. A bar of metal with…

A:

Q: certain step-down transformer brings the 120 V AC to 10 V AC. If the input coil has 450 turns, how…

A: We know that in case of transformer  VS / NS = VP / NP VS = SECONDARY VOLTAGE = 10 V NS = SECONDARY…

Q: explain why a transformer may be operated only on AC?

A: Transformer works only in a.c because it works on the principle of the rate of change of magnetic…

Q: How does a transformer keep the circuits oscillations going? And how can the frequency in a coil…

A: Given : To explain how does a transformer keep the circuits oscillations going? And how can the…

Q: Two coils of wire are placed next to each other. The current in the first coil increased from 0 to…

A:

Q: A transformer has 400 primary, and 80 secondary, turns. If an alternating potential of 250 V is…

A:

Q: 8) The resistance of a coil is 52 0. When the frequency is 80 Hz, the voltage on the coil is 72,3…

A:

Q: A transformer is rated at 303W and transforms a higher AC Vrms to 240V-AC. The number of turns in…

A: Power of transformer P=303 W, lower voltage turns N1=316 and higher voltage turns N2=615. Higher…

Q: The self-inductance of the circuit in the figure below is 9.20  10-8 H. Find the back emf when the…

A:

Q: A voltage of 0.35 V is induced across a coil when the current through it changes uniformly from 0.1…

A:

Q: A cell phone charger has a transformer that decreases 220 Volts AC to 5 Volts AC. If the secondary…

A: Formula for the relation between voltage and the turn ratio as, n1n2=v1v2 Primary is v1=220 V v2=5 V…

Q: The self-inductance of the circuit in the figure below is 1.10  10-7 H. Find the back emf when the…

A:

Q: What is the inductance of a coil whose resistance is 101 Ω if it draws 0.53 A from a 111-V, 58-Hz…

A:

Q: Suppose the speed of rotation of the coil in an AC generator is doubl happens to the amount of…

A:

Q: 2. The mutual inductance between two coils is 3.25 mH. A changing current in the primary coil…

A: