Act II-PHYS 2016 Lab 2 Testing Mathematical Models I

Two charges are arranged on a number line. A positive 3C charge is located at zero. A  negative 5C charge is located at x. There are the three regions on the number line. I.   Less than 0 II.  Between 0 and x III. Greater than x In which region(s) could the electric field have a magnitude of zero?

Determine the electric field strength at a point 1.00 cm to the left of the middle charge shown in the figure below. (Enter the magnitude of the electric field only.) Three charges lie along a horizontal line. A 6.00 µC positive charge is on the left. 3.00 cm to its right is a 1.50 µC positive charge. 2.00 cm to the right of the 1.50 µC charge is a −2.00 µC charge.  N/C(b) If a charge of −3.89 µC is placed at this point, what are the magnitude and direction of the force on it? magnitude      N direction      ---Select--- toward the right toward the left upward downward

Four point charges q1 = 43.00 nC, q2 = –37.00 nC, q3 = 3.00 nC and q4 = 38.00 nC are found at the corners of a square with side 18.00 cm. Find the work necessary to bring a charge q5 = –42.00 nC from infinity to the center of the square.

1-22. For the figure below, determine the magnetic field intensity in A/m and its direction (into or out of the paper) at point P between the two straight wires. 10A 6mm 4mm 20A

Please consider the choices.

A rubber rod is rubbed with fur, so that the fur becomes positive. The rod is then used to charge an electroscope. The charge on the electroscope will be:positive if charged by contact. neutral. positive if charged by induction.negative if charged by induction.

Determine the electrical force of attraction between two balloons with separate charges of +3.5 x 10 exp-8 C and -2.9 x 10 exp -8 C when separated a distance of 0.5 m. Determine the interaction between the electrical charges. Blank 1Blank 2 Blank 1 Add your answer Blank 2 Add your answer

9. In the figure to the right, find the magnitude and direction of the electric field at points A, B,C and D. B 25 cm 25 cm 25 cm 25 cm D +75 µC +75 µC 10. In Question 9, calculate the work needed to move a 1.5 C test charge from point B to point D.

Chapter 22

A platinum resistance temperature detector (RTD) is used to measured temperature of the hot gas. The resistance of sensing element is 250.3 ohm when it contact with hot gas, calculate the temperature of the gas. The RTD has a resistance of 120 ohm and 80 ohm at 100°C respectively. The temperature coefficient of platinum is 0.0039 C^-1.

In a Townsend's first ionization coefficient if the field is kept constant means that O a. P = V/d O b. V = f (Pd) O c. V = E/P O d. V/d = Constant

Draw the electric field lines for the field generated by the four charges of the figure. +q +q -q -q