Electricity and Magnetism Answers

A 100 m long thread carries charges uniformly distributed along its length. An
electron, 10 cm away from the centre of the thread along a line perpendicular to the
thread experiences an attractive force of 2.7 × 10−12N. Calculate the total charge on
the thread.

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Is it true which is being showed in the above video link?

Can you help me solve this problem:
Wire l is moved at velocity v to accelerate charge q from the gun to the space between the plates. The plates are separated by a distance d and hold potential V. Over the length L of the plates, how much will the particle drop?

Hi,
I have a spherical of ferroelectric material.So polarized is permanent Which is located in an external electric field and We want to find it depolarization field. How can we calculate potential and depolarization field?

A molecule of DNA (deoxyribonucleic acid) is 2.19 μm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.20% upon becoming charged. Determine the effective spring constant of the molecule.

answer in N/M

If the power of a source remains constant, by what factor does the intensity of sound change if an observer moves 4 times as far from the source. No units required.

A 30 turn circular coil of radius 4cm and resistance 1 ohms is placed in a magnetic field directed perpendicularly to the plane of the coil. the magnitude of the magnetic field varies in time according to the expression B = 0.01t + 0.04t^2 T. calculate the induced electro magnetic field in the coil at t = 5 seconds

If the potential across two parallel plates, separated by 1.50 cm, is 12.0 volts, what is the electric field strength in volts per meter?

If charge is 20 C , distance is 2 centimeter and work is 2 jule , then what will be the value of potential difference?

in a similarly electric field the potential is 10 volt on coordinates of origin and potential of every point (1,0,0),(0,1,0) and (0,0,1) is 8 volt.then what will be the value of potential at point (1,1,1)?