Electric Circuits Answers

Let A = last nonzero digit of your ID number.

B = last 2 nonzero digits of your ID number. ID: 20-1511-267

1. A/An A-meter long metal pipe at B°C is heated until it increases its length by 0.0025 m at 102°C. (A) What is the initial temperature in Fahrenheit? (B) What is the initial temperature in kelvin?. (C) What is the coefficient of linear expansion of the metal?

2. Find the volume expansion of a brass block at B°C if it is heated to 100 °C. Its initial volume is 15 in3 . The coefficient of volume expansion for brass is 56 x 10-6/°C.

Equivalent capacitance of parallel combination is different from that of series combination.justify

A 240-V clothes dryer draws a current of 15 A. How much energy, in kilowatt-hours and in joules, does it use in 45 minutes of operation?

A proton moves from point A to point B. Its distance from point A is 2mm and from point B is 4 mm. Find: a. the potential difference from point A to B b. work done on the proton

 the resistance of a light bulb.

resistance vs diameter

Three charges Q1= 2 microcoulomb (0,0)cm, Q2= 4 microcoulomb (0,10)cm and Q3= -3 microcoulomb (15,0)cm acts on one number another. Find the magnitude of the total electric force and the angle that the total electric force makes with the positive x-axis

What is the magnitude of the columbic force between two point charges +3 microcoulumb and +5 microcoulumb separated from each other by a distance of 30cm in free space. What is the nature of the force?

19.Two insulated charged copper spheres A and B have their centres separated

by a distance of 50 cm. What is the mutual force of electrostatic repulsion if

the charge on each is 6.5 × 10–7C.Suppose the spheres A and B have

identical sizes. A third sphere of the same size but uncharged is brought in

contact with the first ,then brought in contact with the second, and finally

removed from both. What is the new force of repulsion between A and B?

a 12 resistor and a 15 resistor are connected in series Across 9.0 V potential difference what is the current in the circuit