Electricity and Magnetism Answers

100V battery is connected across 2 parallel plates of distance 8mm. A proton starts from rest and pass through plates which has 1.5kV potential difference. If the proton passes the plates without deflection, find the magnitude of B.

Two small spheres spread 10 cm apart have equal but opposite charge. If the magnitude of the force between them is 2.5 x 10^-10 N
(a)Calculate the charge on each sphere.
(b)Calculate the electric field intensity at the mid-point.
(c)Calculate the electric potential at the mid-point.
(d) How many excess electrons must be present on each sphere.

A resistance thermometer made from platinum has a resistance of R0=50 ohms at T0=20 degrees Celsius.(Temp coefficient of platinum, a=4.0 x 10^-3)
(a) When we connect it to a battery of 9V(no internal resistance), calculate the current.
(b)When the thermometer is immersed in hot water, we measure the current as 0.15A. hat is the temperature of the water?

Determine the total charge within the sphere r=5m if the charge volume density is (200/(r^2 theta)

Is a electromagnet more powerful if the centre core is long than short is longer the better just like adding more wraps

A magnetic field in a region of space produced by a long straight wire
carrying a current I has the form

what magnetic flux penetrates the flat surface 50. when the field is induced 0.4 t, if this surface: a) is perpendicular to the vector and the field's field; b) is located at an angle of 45 ° to the induction vector; c) is located at an angle of 30 ° to the induction vector

The flying wallendas decided to tale their high wire, tight rope walking acrobatic circus act to the next level. The idea was to walk across the grand canyon on a single wire that was not actually attached to either end but instead levitated by a strong magnetic field. Tino (85kg), Nik (82kg), and Evita (65kg) Wallenda purchased a discarded high voltage line (1200kg) that was just long enough to cross the 69.5 meter East to West gap and was able to carry a maximum current of 1500 Amps. In need of your physics expertise they have asked you to calculate the magnitude and direction of the magnetic field necessary to levitate the wire as the three wallendas cross the Grand Canyon in their famous 3-person pyramid!! Calculate carefully, their lives are in your hand.

An electron is in two separate electric fields, one that is 1500 N/C West and one that is 2000N/C North. If the mass of an electron is 9.1 x 10^-31kg, find the acceleration of the electron.

A positive point charge of magnitude q and mass m is dropped from a great
height h onto another similar charge fixed on the ground. The minimum distance
between the charges in CGS units is: