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An isolated charged conducting sphere of radius 12.0 cm
creates an electric ﬁeld of 4.90 * 104
N/C at a distance
21.0 cm from its center. (a) What is its surface charge density? (b) What is its capacitance?
An air-ﬁlled capacitor consists of two parallel plates,
each with an area of 7.60 cm2
, separated by a distance of
1.80 mm. A 20.0-V potential difference is applied to these
plates. Calculate (a) the electric ﬁeld between the plates,
(b) the surface charge density, (c) the capacitance, and
(d) the charge on each plate.
When a potential difference of 150 V is applied to the
plates of a parallel-plate capacitor, the plates carry a surface
charge density of 30.0 nC/cm2
. What is the spacing
between the plates?
A 50.0-m length of coaxial cable has an inner conductor that has a diameter of 2.58 mm and carries a charge of
8.10 ohmC. The surrounding conductor has an inner diameter of 7.27 mm and a charge of -8.10 ohmC. (a) What is the
capacitance of this cable? (b) What is the potential difference between the two conductors?
(a) How much charge is on each plate of a 4.00-%F capacitor when it is connected to a 12.0-V battery? (b) If this
same capacitor is connected to a 1.50-V battery, what
charge is stored?
a solid steel ball of volume 1 cm3 is recast into a hollow sphere so as to float on water. What should be the minimum volume of this hollow sphere when density of steel is 7.71 g/cm3 and that of water is 1g/cm3 ?
A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 240 m, and the car completes the turn in 39.0 s.find the magnitude.
Hi... I'm pondering with this question from many days but couldn't get a satisfactory answer... As Sir Einstein said that if we reach the speed of light(186,000 miles/sec) the mass would turn infinite. But my question is, even light is a particle and it has got certain mass, and if it moves with 186,000 miles/sec it's mass would be infinite.. But how is that possible? Please help me in this question.. Thanks
two similar wires made of the same material each of length 50cm and cross-sectional area 2mm .they are connected in series in an electric circuit to a battery of an internal resistance 0.5ohm . an electric current of 2A flows. when the wires are connected in parallel to the same battery the total current in the circuit increase to 6A : calculate the electromotive force of the battery used
The term "potential energy" was coined by the 19th century Scottish engineer and physicist William Rankine, although it has links to Greek philosopher Aristotle's concept of potentiality. Potential energy is associated with a set of forces that act on a body in a way that depends only on the body's position in space. Potential energy exists when a force acts upon an object that tends to restore it to a lower energy configuration. This force is often called a restoring force. For example, when a spring is stretched to the left, it exerts a force to the right so as to return to its original, upstretched position.
Explain the concept of Potential Energy in detail with examples.[Include necessary sketches]