Physics Answers

capacitors with a capacitance of 5µF, 10µF, and 15µF are connected in parallel and charged with a 12-V battery. (A) What is the voltage across each capacitor? (B) What is the charge in each capacitor? (C) Calculate the total capacitance.

Ms. Enriquez instructed the students to choose which between the two capacitor has the greatest capacitance. The metal plates of Capacitor A has an area of 100 cm² separated by a distance of 0.2 cm while Capacitor B's metal plates is 0.4 cm away from each other with an area of 50 cm². Which one shall the students choose?

5. The electric field caused by a certain point charge has a magnitude of 5.0 × 10^3 𝑁 𝐶 at a distance 0.10m from the charge. What is the magnitude of the charge?

6. Two particles having charges 𝑞1 = 1.00 × 10^−19𝐶 and 𝑞2 = 2.00 × 10^−9𝐶 are separated by a distance 2.00m. At what point is the total electric field due to the two charges equal to zero?

7. Create an illustration of the electric field lines of 𝑞1 = 1𝐶 between 𝑞2 and 𝑞3 both having a charge od -2C.

8. A uniform electric field 𝐸 = 8000 𝑁 𝐶 passing through a flat surface with an area of 𝐴 = 10𝑚^2 . Determine the flux if: a.) the electric field direction and the line perpendicular to the surface is pointing in the same direction. b.) the electric field direction and the line perpendicular to the surface is perpendicular. c.) the angle is 45�

An object with an initial velocity of 20 m/s accelerates uniformly at 5 m/s 2 in the direction of its motion at a distance of 10 m. What is the final velocity of the object?

1. Two charges are located on the positive x-axis of a coordinate system. Charge 𝑞1 = 2 × 10^−9𝐶 is 2cm from the origin, and charge 𝑞2 = −3 × 10^−9𝐶 is 4cm from the origin. What is the total force exerted by these two charges on a charge 𝑞3 = 5 × 10^−9𝐶 located at the origin?

2. A negative charge of −0.50 × 10^−6𝐶 exerts a repulsive force of magnitude 0.20 N on an unknown charge 0.20 m away. What is the unknown charge (magnitude and sign)?

3. How many excess electrons must be placed on each of two small spheres spaced 3cm apart if the spheres are to have equal charge and if the force of repulsion between them is to be 10^−19𝑁?

4. What is the electric field 30cm from a charge 𝑞 = 4 × 10^−9𝐶?

A – 41 nC charge is placed in between two-point charges, 32 nC and 24 nC. The negative

charge moves from point a to b. What is the change in potential energy?

Three 3.0μC charges are at the three corners of a square of side 0.50m. The last corner is occupied by a -3.0μC charge. Find the electric field at the center of the square.

A 670m long eureka wire has resistance of 250 ohms. What length of the same wire will have a resistance of 110 ohms?

The speed of a car increased from 36km/hr to 96km/hr in 0.6km . How long did this take and what was the acceleration

the electron beam in a television tube consist of electron accelerated from rest through a potential difference of about 20000 v. what is the speed of the electrons?( ignore relativistic effects.) electron rest mass is 9.11x 10^31kg and electronic charge is 1.6x10^19c