Question 3 a) A coil consist of 2000 turns of copper wire having a cross sectional...

Question 3
a) A coil consist of 2000 turns of copper wire having a cross sectional area of 0.8mm2. The mean length per turn is 80 cm and the resistivity of copper is 0.02μΩ-m. Find the resistance of the coil and power absorbed by the coil when connected across 110V D.C supply. AN [8marks]
b) A circuit consist of four 100W lamps connected in parallel across a 230V supply. Inadvertently, a voltmeter has been connected in series with the lamps. The resistance of the voltmeter is 1500Ω and that of the lamps under the conditions stated is six times their value when burning normally. What will be the reading of the voltmeter?
CR[8marks]
c) Explain why a capacitor has a high reactance for a direct current. EV[4marks]

Expert Solution

Simply apply the ohms law and applied the power formula.

Manojponduru answered 1 month ago

Question 1 A copper tube having a cross-sectional area of 2000 mm2 and length of 300...

Question 1 A copper tube having a cross-sectional area of 2000 mm2 and length of 300 mm is placed between two rigid caps. Four 22 mm diameter steel bolts are symmetrically arranged parallel to the axis of the tube and are lightly fastened. Calculate: The stress in the tube if the temperature of the assembly is raised by 700C. The load each bolt will carry at the raised temperature. EST = 200 GPa; αST = 12 x 10-6...

coil has 30 turns and carries current. The cross sectional area of the coil is 7.5cm....

coil has 30 turns and carries current. The cross sectional area of the coil is 7.5cm. At a point located on the axis of the coil at a distance 1.5m, the magnetic field os 0.2mG, what is current in the coil?

1. A magnet is inserted into a coil of wire consisting of 10000 loops. The cross-sectional...

1. A magnet is inserted into a coil of wire consisting of 10000 loops. The cross-sectional area of the coil is 0.5 m2and is kept in a uniform magnetic field of B = 4 T. Assume that the angle between the surface normal of the coil and magnetic field is qo= 45oat t0= 0s. The coil is rotated at a constant rate to an angle, q= 900at t = 60s. What is the average induced voltage (emf) induced in the...

A 33 cm diameter coil consists of 19 turns of cylindrical copper wire 2.8 mm in...

A 33 cm diameter coil consists of 19 turns of cylindrical copper wire 2.8 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 9.50

A long, straight, copper wire with a circular cross-sectional area of 2.1 mm2 carries a current...

A long, straight, copper wire with a circular cross-sectional area of 2.1 mm2 carries a current of 22 A. The resistivity of the material is 2.00 10-8?

A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There...

A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There is a magnetic field parallel to the axis of the coil. If the induced current in the coil is 2.80 A, what is the rate of change of the magnetic field? a) 0.0839 T/s b) 3.63×10-6 T/s c) 12.8 T/s d) 1.74×103 T/s

A solenoidal coil with 23 turns of wire is wound tightly around another coil with 350...

A solenoidal coil with 23 turns of wire is wound tightly around another coil with 350 turns. The inner solenoid is 25.0 cm long and has a diameter of 2.40 cm . At a certain time, the current in the inner solenoid is 0.120 A and is increasing at a rate of 1600 A/s A)For this time, calculate the average magnetic flux through each turn of the inner solenoid. Express your answer in webers. B)For this time, calculate the mutual...

A solenoidal coil with 30 turns of wire is wound tightly around another coil with 310...

A solenoidal coil with 30 turns of wire is wound tightly around another coil with 310 turns. The inner solenoid is 20.0 cm long and has a diameter of 2.50 cm . At a certain time, the current in the inner solenoid is 0.150 A and is increasing at a rate of 1700 A/s . Part A For this time, calculate the average magnetic flux through each turn of the inner solenoid. Part B For this time, calculate the...

A solenoidal coil with 28 turns of wire is wound tightly around another coil with 320...

A solenoidal coil with 28 turns of wire is wound tightly around another coil with 320 turns. The inner solenoid is 21.0cm long and has a diameter of 2.20cm . At a certain time, the current in the inner solenoid is 0.150Aand is increasing at a rate of 1600A/s Part A For this time, calculate the average magnetic flux through each turn of the inner solenoid. Part B For this time, calculate the mutual inductance of the two solenoids; Part...

A solenoidal coil with 20 turns of wire is wound tightly around another coil with 320...

A solenoidal coil with 20 turns of wire is wound tightly around another coil with 320 turns. The inner solenoid is 21.0 cm long and has a diameter of 2.50 cm . At a certain time, the current in the inner solenoid is 0.140 A and is increasing at a rate of 1800 A/s . For this time, calculate the mutual inductance of the two solenoids; For this time, calculate the emf induced in the outer solenoid by the changing...

Question