Physics Answers

Two point charges ares separated by a distance of one meter .The two point charges have magnitudes of 2.5x10^-4 C and 1.5 x10^-2 C.Find the electric force between the two. Round your final answer to it's nearest hundreths.

 How much work would be required to move 4.0C of charge between the same two points of the problem above?

Capacitance is measured in___________ 

a.) Hz

b.) Farads

c.) Coulombs

d.) Volts

If the capacitor is CONNECTED to the battery, what remains constant if the area of the metal plates is increased? *

1 point

a.) Capacitance

b.) Charge stored in the capacitor

c.) Energy stored in the capacitor

d.) Voltage across the metal plates

You have three capacitors and a battery. In which of the following combinations of the three capacitors will the maximum possible energy be stored when the combination is attached to the battery? 

a.) Series

b.) Parallel

c.) Both combinations will store the same amount of energy

d.) None of the above

Two parallel plate capacitors C1 and C2 are arranged in parallel within a 10V circuit. If C1 stores 2C of charge and C2 stores 5C of charge, each over 3 seconds, what is the total capacitance of the circuit? 

a.) 0.7 F

b.) 2.4 F

c.) 1.8 F

d.) 0.2 F

Two capacitors are fully charged and connected in series in a circuit powered by a 10V battery. Find the charge stored.C1=6FC2=2F

a.) 80F

b.) 80C

c.) 15F

d.) 15C

_________ is created out of two metal plates and an insulating material called a dielectric. 

a.) An inductor

b.) A capacitor

c.) A variable resistor

d.) A fixed resistor

What happens to the charge in a capacitor during the discharging process? 

a.) I dont know

b.) Decreases over time

c.) Remains the same

d.) Increases over time

What is a capacitor? *

a.) A device for storing capacitance

b.) A device for storing charge.

c.) A device for storing energy.

d.) A device for storing p.d.

Which of the following statements about dielectrics is false? 

A dielectric material increases capacitance by increasing stored charge

A dielectric material increases voltage by decreasing stored charge

A dielectric material increases capacitance by decreasing voltage

A dielectric material is non-conducting

A 2μF and 6μF capacitor are connected in series with a 12V battery. What is the maximum charge stored on the 2μF capacitor?

a. 96μC

c. 18μC

b. 13.5μC

d. 24μC

How much charge flows from each terminal of a 12.0-V battery when it is connected to a 5.00-μF capacitor? 

The two plates of a capacitor hold +2500 μC and -2500 μC of charge, respectively, when the potential difference is 960V. What is the capacitance?

500.g of brass (c=.0920 cal/g°C) at 200.°C and 300.g of steel (c=.115 cal/g°C) at 150.°C are added to 900.g of water (c=1 cal/g°C) in a 150.g Aluminum pan (c=.220 cal/g°C), both of which are at 20.0°C. Find the common equilibrium temperature.

An object is 3 inches in front of a concave mirror with radius of curvature 12 inches.

Find: a) the image distance.

b) the magnification.

c) the image description: real of virtual? erect of inverted?