Electric Circuits Answers

you have a 2Ω, a 3Ω, and a 4Ω resistor in series with a 4.5V battery. Sketch the circuit. What is the total current going through the battery?

Three charges lie along the x-axis. the positive charge q1=15µC is at x=2.0m, and the positive charge q2=6.0µC is at origin. Where must a negative charge q3 must be placed on the x axis so that the resultant electric force on it is zero?

What affect the brightness of two identical bulbs .and will they be brighter in series or parallel series

(1) With a speed of 0,15m/s moves a 2,4dm long conductor perpendicular to the field lines in a field flow density is 28mT. how much voltage is induced in the conductor?
(2) a car runs at a speed of 90km / h on a horizontal wall where the earth magnetic field is 52µT and the angle of inclination is 68. how much voltage is induced between the ends of a 1.6m long axis?
(3) Two parallel metal plates are in a vacuum. the voltage between the plates is 5.7kV, according to a small plastic ball with a mass of 44mg falls at a constant speed in space between the plates. the distance between the plates is 1.7cm. calculate the ball charge

A doorbell needs 0.5A and 8.0V and is therefore connected to a transformer secondary coil. The primary coil has 3000 turns and is connected to a 230V wall socket (a) how many turns does the secondary coil need? (b) How big is the current in the primary coil?

A wire has a diameter of 5mm, length 50m and resistivity 3.2x10 to the power of -8 ohms meter. What is the resistance of my wire?

when do static electricity occur ?

An object of weight 120N vibrates with a period of 4.0s when hang from a spring. Calculate the force per unit length of the spring [g=10m/s, π=3.142]

if a piezoelectric structure generates 150 volts and 80 milliwatts with net energy transfers of 2 millijoules per compression how many compressions would be required to charge a 4.4kWh Li-ion battery? Or put another way - if the compression occurred at a rate of 10 per second how long would it take to charge such a battery?

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In the circuit shown V tot= 8V. Determine