Electric Circuits Answers

For the equation y = c1*m sin( c2*xt - c3*mt + 2*c4*x ).The dimension of c1 is:

An oil drop of mass 1.0mg and having a charge of 2.0 x 10^-6 is suspended in a box. What is the magnitude of the electric field in the box?

how much work is required to move a charge of 4nC from a point 2m away to a point 0.5m away from a point charge of 60nC?what is the potential difference between these points?

If the electron affinity of glass is less compared to electron affinity of animal fur, then the charge on a glass rod that has been rubbed with animal fur is

an e.m.f. represented by e=100 sin 100pi t is impressed across a circuit consisting of 40 ohms resistor in series with a 40microF capacitor and a 0.25 H indicator. Determine the r.m.s value of the current the power supplied the power factor.

a series circuit with R=10 ohms,L=100mH and C=100microF is supplied with 200 V/50Hz. Find the impedance,current,power,power factor.

Two charges - 16 and + 4 µC, are fixed in placed and separated by 3.0 m .

a)       At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. ( Hint: The spot does not necessary lie between two charges.)

b)       What would be the force on a charge of + 14 µC placed at this point?

1) A kettle plugged into the electric socket

i) Using the axes provided, draw graphs showing how the potential difference

varies with time for each device. Add scales to the axes to indicate approximate

values.

ii) Explain how the electrons move through the device in each case.

2)A battery-operated torch

i) Using the axes provided, draw graphs showing how the potential difference

varies with time for each device. Add scales to the axes to indicate approximate

values.

ii) Explain how the electrons move through the device in each case.

An alpha particle, with velocity of magnitude 500 m/s, travels horizontally into a region of space in which

there is an upward-directed uniform electric field of magnitude 29 N/C and a uniform magnetic field. The

magnetic field makes an angle of 35° with the particle’s velocity vector and is such that it causes the alpha

particle to pass through the region of space undeflected.

How would you determine the magnitude of the magnetic field that is required to cause the alpha particle to pass

through undeflected?

show that for two capacitor of area A seperated by a distance D apart with a di electric material of tickness T in between them. a capacitance is given by the expression C= permitivity of A (1/d-1 +permitivity of r/t