The gecko in the photo is sticking upside down to a smooth ceiling. The remarkable adhesion might be due to static electricity. Gecko feet are covered with microscopic hairs. When these hairs rub against a surface, charges separate, with the hair developing a positive charge and negative charge forming below the surface. There is an attractive force between the separated charges. This is an effective means of adhering to a surface, but it comes at a cost: Two planes of charge are like two charged plates of a capacitor, which takes energy to charge. Doubling the amount of charge on each surface increases the attractive force, but also increases the energy required to separate the charge. By what factor does this energy increase?

Q: In the future people will only enjoy one sport: Electrodisc. In this sport you gain points when you…

A: Initial charge on disk A = -8 μC Initial charge on disk B = -2 μC Initial charge on disk C = 5 μC…

Q: Two small balls with a mass of 2 g each are hanging on two separate strings 0.5  m (50 cm)  long…

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Q: Two identical small conducting spheres are separated by 0.60 m. The spheres carry different amounts…

A: Given thatSeperation between the charges=0.60mThe total charge on sphere=Electric force (F)=10.8NTo…

Q: Two objects are identical and small enough that their sizes can be ignored relative to the distance…

A: Given charge on object 1 = q1 charge on object 2 = q2 distance between q1 and q2 = 0.281 m force…

Q: There are two charges in the xy plane and no other nearby charges. There is a 9 millicoulomb charge…

A: Q1 = 9×10-³ C  Q2 = 8×10-³ C  x = 21 m  y = 35 m

Q: Two balloons have equal, but opposite sign charges.  Balloon A has N = 1 million excess electrons.…

A: Number of electrons on A and B, N = 1 million = 106   Distance, d = 1.6 m

Q: Two small, identical conducting spheres repel each other with a force of 0.6N when they are 0.24m…

A: Given, F=0.6 Nr=0.24 mF'=0.9 N

Q: Electrodisc, the sport of the future, has players skating across the field on hover shoes pushing…

A:

Q: Two charged parallel plates are separated by 5 cm. A uniform field of 4x102 N/C exits between the…

A: Force on a charge, q in an electric field, E is  F = qE the foce on the positive charge is towards…

Q: Two-point charges are found at a distance of 25 cm from one another. The two-point charges are…

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Q: Two positive charges, each of magnitude 6 uC, are on the y-axis at points y = 3 m and y = -3 m.…

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Q: Four charges of +1.2 µC are placed at three corners of a square of side 10.0 cm. What is the…

A: First we have to calculate electrostatic force on a charge due to other charges. Then add them…

Q: Electrons have a charge of q = -1.602 × 10-19 C. A student observes that a Styrofoam cup has a total…

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Q: A small plastic ball of mass 6.34 × 10-3 kg and charge +0.164 μC is suspended from an insulating…

A: From equilibrium condition we can calculate the charge of each plate

Q: Two small spheres that have positive charges q1 = 3q and q2 = q are attached to opposite ends of a…

A: Given data: The charge of the sphere at the origin is q1=3q. The charge of the second sphere on the…

Q: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of…

A: The elwctrostatic force between two charges  and , separated by a distance  is,Where,  is Coulomb's…

Q: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of…

A:

Q: True or False? the magnitude of electric force between two point charges varies directly as the…

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Q: Two small balls with a mass of 2 g each are hanging on two separate strings 0.25  m (25 cm)  long…

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Q: Sara is preparing for her birthday party. She rubs three balloons with her wool scarf, then hangs…

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Q: A charge of 5 pC is at the origin. What is the magnitude and direction of the electric field on the…

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Q: An outside force, Fo, brings two small metal spheres, A and B, at rest from a long distance away to…

A: Part (1) Given: The distance between two spheres is r=0.9 m. The mass of first sphere is mA=5.2 g.…

Q: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of…

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Q: 8c21p7) Two identical conducting spheres, fixed in place, attract each other with an electrostatic…

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Q: 2q d +-x 2d d

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Q: Two pollen grains each possess a net electric charge. The left grain has g₁ = 7.4×10-6 Coulombs of…

A: Approach to solving the question: Coulomb's Law describes the electric force between two charged…

Q: Two identical balloons are inflated and charged in the same manner. They are tied by threads and…

A: The electrostatic force between the two charges q1 and q2 separated by a distance r…

Q: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of…

A: Approach to solving the question: Detailed explanation:Examples: Key references:

Q: Consider the following situation. Particles A and B have equal charge. They are separated by a…

A: Given,  Particle A and B have equal charge. They are separated by a distance d. They each experience…

Q: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of…

A: Given, two identical spheres, fixed in place, attract each other with an electrostatic force of…

Q: An old fashioned computer monitor accelerates electrons and directs them to the screen in order to…

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Q: The gecko is sticking upside down to a smooth ceiling. The remarkable adhesion might be due to…

A: Step 1: Given data: Two charged plates of a capacitor.Required to calculate by what factor does the…

Q: onnected by a lightweight spring having a spring constant k = 0.2 N/m, as shown in the figure. The…

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.