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Presentation transcript:

Let’s Play! Please listen carefully and think before answering. Good Luck!!

Electrostatics

Coulomb’s Law

E-Fields

Ohm’s Law

Equivalent Resistance

Lab Stuff

Electro- statics Coulomb’s Law E-Fields Ohm’s Law Equivalent Resistance Lab Stuff

What is

A negatively charged rod is brought close to an electroscope and two aluminum leaves separate. The charge on the leaves is (A) Both positive (B) Both negative (C) One positive; one negative (D) Impossible to determine

What is (B) both negative?

What is (2) increase?

If you place excess charge on a metal object, after some time… (A)The charge will stay in the area you placed it. (B)The charge will concentrate into a smaller area. (C)The charge will spread out evenly. (D)There is no way to know.

What is… The charge will spread out evenly?

If you place excess charge on a rubber object, after some time… (A)The charge will stay in the area you placed it. (B)The charge will concentrate into a smaller area. (C)The charge will spread out evenly. (D)There is no way to know.

What is The charge will stay in the area you placed it.

From the picture, what can you conclude about the charges? 1) have opposite charges 2) have the same charge 3) all have the same charge 4) one ball must be neutral (no charge)

3) all have the same charge

Two identical charges Q, separated by a distance R, feel an electric force F. By what factor does the force change if the distance is doubled (2R)? (A) 2F(D) F/2 (B) 4F(E) F/4 (C) F

What is (e) F/4?

What is…

What is 2.4 N?

What is…

What are the signs of the charges whose electric fields are shown? A) B) C) D) E) no way to tell

What is… A) B) C) D) E) no way to tell

What is…

What is  ?

If the charge on the left is +Q, this is the charge on the right.

What is +3Q?

This is the direction of the E-field at point P. +Q -Q P

What is  ? +Q -Q P

What is…

What is 15 ohms?

Daily Double!

This is the current through resistor R

What is 1 Amp?

This is the reading of voltmeter V

What is 40 volts?

If the voltage is doubled and the resistance is halved, by what factor does the current change?

What is it increases by a factor of 4?

This is the equivalent resistance

What is R = R1 + R2 R = R =10 Ω

What is 2.4 ohms?

This is the equivalent resistance

What is 0.5 ohms?

This is the equivalent resistance

What is 3 ohms?

Three resistors, 4 ohms, 6 ohms, and 8 ohms, are connected in parallel in an electric circuit. The equivalent resistance of the circuit is (1) less than 4 Ω (2) between 4 Ω and 8 Ω (3) between 10. Ω and 18 Ω (4) 18 Ω

What is (1) less than 4 ohms?

This is the resistance of the ceramic resistor shown Black0 Brown1 Red2 Orange3 Yellow4 Green5 Blue6 Violet7 Gray8 White9 Gold5% brownblack greengold

What is 1,000,000 ohms?

Voltage Voltage (V)

What is 10 ohms?

A 15-ohm resistor, R1, and a 30.-ohm resistor, R2, are to be connected in parallel between points A and B in a circuit containing a 90.-volt battery. Show the two resistors connected in parallel between points A and B.

300a

In a series circuit, this is the same for all the resistors.

What is the current?

Daily Double!

This/These bulb(s) will light.

What is…

Final Jeopardy

V-I-R charts

This is the resistance of resistor R

What is… 190 ohms?