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What is resistance.
Where did the cos(a) value came from?
Find the current (I1, I2, and I3) in each branch of the circuit using Kirchhoff's Laws.
Six Christmas tree lights are arranged in parallel circuit as shown in the figure. Each bulb dissipates 10W when operated at 120V. (a) What is the resistance R of each bulb? (b) What is the resistance of the entire array of bulbs? (c) What is the total power consumption of the array? (d) What are the currents at points a, b, c, and d?
Supposed the battery in the figure is 45 V and the resistor R1 = 300 ohms. (a) What must the resistor R2 be in order that the current I be 0.45 A? (b) What are the currents I1 and I2?
Three resistances of 12, 16, and 20 ohms are connected in parallel. What resistance must be connected in series with this combination to give a total resistance of 25 ohms?
- You have an equilateral triangle, and it happens you place three charges 16C 18C 17C on each vertex, the equilateral triangle is separated by the distance r. What is the total net force experience by q2 due to other two charges if the charge is place at the middle vertex of the triangle?
An arc with radius R=0.25m and length l=π/12 meter carries 3A current. What is the magnetic field B at the center of the arc.
You have an equilateral triangle, and it happens you place three charges 28C, -52C, 60C on each vertex, the equilateral triangle is separated by the distance 44fm. What is the total net force experience by q2 due to other two charges if the charge is place at the middle vertex of the triangle?
For static magnetic field Maxwell's curl equation is given by
A. ∇ . B= μ0H
B. ∇ x B = 0
C. ∇ x B = μ0J
D. ∇ xB = μ0/t
