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Question

1. Two charged particles are placed 2.0 meters apart. The first charge is +2.0 E-6 C and the second charge is +4.0 E-6 C. What is the electrical force between the two charges?

(k = 9.0 E9 Nm^2/c^2) Is it attractive or repulsive?

2. A flashlight bulb is connected to two dry cells with an equivalent voltage of 4.50 V. If the bulb draws a current of 12.0 mA (1000mA = 1A), its resistance is?

3. Consider the electric force between a pair of charged particles a certain distance apart. By Coulomb's Law,

if the charge on one of the particles is doubles, the force is?

4. Suppose you have a simple circuit that includes a resistance device of 50. Ohms and the current flowing through it is 2.0 amps. Solve for the potential different of the batteries.

How strong is the repulsive force exerted on two point charges that each carry 1.0 E-6 C of negative charge and are 0.30 meters apart?

Coulomb’s Constant is 9.0 E9 N*m^2/C^2

Remember to identity all of your data, write the equation, and show work

Answer 1

2. A flashlight bulb is connected to two dry cells with an equivalent voltage of 4.50 V. If the bulb draws a current of 12.0 mA, its resistance is?

R = E/I = 4.5/12 = 0.375 k or 375 ohms

3. Consider the electric force between a pair of charged particles a certain distance apart. By Coulomb's Law,

if the charge on one of the particles is doubles, the force is?

doubled

4. Suppose you have a simple circuit that includes a resistance device of 50. Ohms and the current flowing through it is 2.0 amps. Solve for the potential different of the batteries.

E = IR = 2*50 = 100 volts

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