What is true about the charged particles moving through an electric circuit? O They can move through an open loop. O They move from lower to higher potential energy. O They move from higher to lower potential energy. O They do not need energy from an external source to move.

#87: The flash unit in a camera uses a special circuit to “step up” the 3.0 V from the batteries to 300 V, which charges a capacitor. The capacitor is then discharged through a flashlamp. The discharge takes 10 ms, and the average power dissipated in the flashlamp is 105 W. What is the capacitance of the capacitor?

A 80-pF capacitor and a 320-pF capacitor are both charged to 1.70 kV. They are then disconnected from the voltage source and are connected together, positive plate to negative plate and negative plate to positive plate. (a) Find the resulting potential difference across each capacitor. V 80 pF = 1.02 kV V 320 pF = 1.02 kV (b) Find the energy lost when the connections are made. 3.7*10**6

Question 2: #46       With the switch open, the potential difference across the capacitor in Figure below is 10.0 V. After the switch is closed, how long will it take for the potential difference across the capacitor to decrease to 5.0 V?

Consider the figure below. C2 0.300 uF (a) Find the charge stored on each capacitor in the figure shown above (C, = 11.8 µF, c, = 8.78 µF, and C, = 0.300 µF) when a 2.00 V battery is connected to the combination. Q1 = Q2 = Q3 = C (b) What energy is stored in each capacitor? E = E2 = E3 =

A coaxial cable used in a transmission line has an inner radius of 0.11 mm and an outer radius of 0.65 mm. Calculate the capacitance per meter for the cable. Assume that the space between the conductors is filled with a material with a dielectric constant of 3.0. Number Units

You wish to lift a 50 kg mass up a distance of 20 m.  You use an electric motor to do the job that plugs into the wall (120 V).  How much charge will flow through the motor to complete this job? (Hint: Potential Energy is equal to mgh)

A student reaches to open a door and gets a small electric shock. She knows that the shock is caused by static electricity, but it seems like in the winter she gets shocked more than in the summer. The student asks her science teacher if there are times of the year when there is more static electricity that builds up than other times of the year. The teacher replies that there is, and it depends on the humidity, or moisture in the air. The more humid the air is, the less static will build up and, therefore, the less you get shocked.   Explain why static electricity does not build up as much when the air is humid. In your response, be sure to include: an explanation of static electricity is formed. an explanation of why the student felt a shock when reaching for the door handle. an explanation of how moisture in the air allows static electricity to dissipate.   Be sure to consider the completeness of your response, supporting details, and accurate use of terms.

I need hep solving this problem related to electric potential and electric potential energy.

Consider what happens when a person moves around in dry conditions. The rubbing of motion leads to static electric charge building up on the body. Assume the capacitance of the human body to be about 155 pF. a) How much charge would have to build up on a body to generate a potential difference of 10 kV? b) A particular cell phone can have its circuits destroyed if exposed to an electric shock containing 300 u.J of energy. What voltage does that correspond to if the shock is coming from a human body?