Electric Circuits Answers

The op amp in the circuit shown in the figure below is ideal.

https://ibb.co/k8gGNJm

Calculate the (a) resistivity and the (b) conductivity of a material that has a length of 15 m and a cross-sectional area of 5 x 10 m² and a resistance (R) of 5 ohms

Let: q1 = +a μC , at the origin q2 = +b μC , b meters to the right of the origin q3 = -ab μC , a meters above q2 q4 = -b/a μC ,

a meters above the origin where: a = number of letters in your family name b = number of letters in your given name.

Find the magnitude and direction of the total electric force and total electric field at q3

How much potential is required to place a 7×10-3 C charge on a 3000 μF capacitor? 

Determine the charge in each capacitor and the voltage across each capacitor.

Given: V3= 5V

C1=1uF

C2= 1uF

C3= 1uF

C4= 1uF

C5= 1uF

what is the resistance of an automobile headlight though which 2.5 A flows when 12.0 V is applied to it?

Determine the voltage output of the circut

• A student finds two ancient meters with numbered scales but no unit markings. He thinks that one is an ammeter and one is a voltmeter but doesn't know which is which. He measures the resistance of each, finding that meter A has a resistance of 500 ohms and meter B has a resistance of 0.10 ohms. He can conclude that _______________

A) A= voltmeter B= ammeter

B) A= not useful B= voltmeter

C) A= voltmeter B= not useful

• The plates of a parallel-plate capacitor are 3.28mm apart, and each has an area of 15.7cm^2. Each plate carries a charge of magnitude 0.9nC. The plates are in a vacuum. What is the potential difference between the plates?

A) 212.46 V

B)222.16 V

C) 228.24 V

• The two plates of a capacitor are given charges plusminusQ. The capacitor is then disconnected from the charging device so that the charges on the plates cannot change, and the capacitor is immersed in a tank of oil. What happens to the electric field between the plates?

A) increases

B) decreases

C) becomes zero

Three capacitors of capacitances C1 = 10 nF, C2 = 15 nF, and C3 = 20 nF are connected in series to a 5-V battery. What is the charge stored in C2 and voltage across C3?