Electric Circuits Answers

Compare the basic construction of Zener diode with a common rectifier diode. Explain Zener breakdown and the corresponding characteristic curve for a Zener diode with Vz = 10 V connected in 12 V regulated power supply. Calculate the Zener impedance if the change in Zener voltage is 150 mV for a 15mA change in Zener current on the linear portion of the characteristic curve. 

Problem 7. Two identical conducting small spheres are placed with their centers r = 0.300 m apart. One is given a charge

of q1 = 12.0 nC and the other a charge of q2 = −18.0 nC. (a) Find the electric force exerted by one sphere on the other.

(b) Next, the spheres are connected by a conducting wire. Find the electric force between the two after they have come to

equilibrium.

Two small spheres assumed to be identical conductors are placed at 30 cm from each other on a horizontal axis. the first S1 is loaded with 12 nC and the second S2 is loaded with -18 nC. make a figure where you need representative.1) determine the electric force exerted by S1 on S2b) determine the electric field created by S1 at the level of s2c) determine the electric potential created by s1 at the level of s2d) determine the electric force exerted by S2 on S1e) determine the electric field created by s1 in the middle of [S1: S2]f) determine the electric field in the middle of [S1: S2]g) determine the electric potential in the middle of [S1: S2]h) determine the electric potential at the level of S1

On a horizontal axis whose unit is the meter, a linear load ranging from 0 to 1 ma a linear load distribution = 2 nC / m.determine the modulus of the electric field created by the previous loaded bar at the point A of abscissa 2m (we have to find the relation between l, which is the distance between the elementary bar and the point A and x which sweeps the segment [0: 1]

An employer or a user of electricity must provide a clear space for operating and maintenance staff at the back and front of all switchboards. The space behind a switchboard should be kept closed and locked at all times and should only be accessed for the purpose of inspection or repairs. Evaluate the cases in which the requirements regarding the clear space at the back of the switchboard is not applicable. 

On a horizontal axis whose unit is the meter, a linear load ranging from 0 to 1 ma a linear load distribution = 2 nC / m.determine the modulus of the electric field created by the previous loaded bar at the point A of abscissa 2m (we have to find the relation between l, which is the distance between the elementary bar and the point A and x which sweeps the segment [0: 1]

Two small spheres assumed to be identical conductors are placed at 30 cm from each other on a horizontal axis. the first S1 is loaded with 12 nC and the second S2 is loaded with -18 nC. make a figure where you need representative.1) determine the electric force exerted by S1 on S2b) determine the electric field created by S1 at the level of s2c) determine the electric potential created by s1 at the level of s2d) determine the electric force exerted by S2 on S1e) determine the electric field created by s1 in the middle of [S1: S2]f) determine the electric field in the middle of [S1: S2]g) determine the electric potential in the middle of [S1: S2]h) determine the electric potential at the level of S1

Two resistors with resistance values of 4.5 Ω and 2.3 Ω are connected in series or parallel

across a 30 V potential difference to a light bulb.

a. Calculate the current delivered through the light bulb in the two cases.

b. Draw the circuit connection that will achieve the brightest light bulb.

2. Explain the term internal resistance.

3. State how you agree or disagree with the following statement.

A good circuit cannot have internal resistance