Cracking the SAT Physics Subject Test

charges on all the plates will have the same magnitude. If the top and bottom capacitors have capacitances of C 1 and C 2 , resp ...

This can be written as which can also be extended to more than 2 capacitators. As you can see, the reciprocal of the capacitance ...

Notice that C 2 and C 3 are in series, and they are in parallel with C 1. That is, the capacitor equivalent to the series combin ...

Substituting in the given numerical values, we get ...

RESISTANCE–CAPACITANCE (RC) CIRCUITS Capacitors are typically charged by batteries. Once the switch in the diagram on the left i ...

Here’s How to Crack It Once the charging currents stop, the voltage across C 3 is equal to the voltage across the battery, so V ...

After the switch is closed, what will be the common voltage across each of the parallel capacitors (once electrostatic condition ...

see that because V doesn’t change, neither will E. Finally, using the equation U = QV, we conclude that since V doesn’t change a ...

C increases by a factor of κ C always increases Q says the same battery disconnected V decreases by a factor of κ Q = C V ...

E decreases by a factor of κ V = Ed UPE decreases by a factor of κ U = Q V ...

C increases by a factor of κ C always increases Q says the same battery disconnected V stays the same Q CV E stays the same V = ...

Chapter 11 Comprehensive Drill See Chapter 17 for solutions. A wire made of brass and a wire made of silver have the same lengt ...

(C) 240 Ω (D) 720 Ω (E) 7,200 Ω A battery whose emf is 40 V has an internal resistance of 5 Ω. If this battery is connected to ...

Three identical light bulbs are connected to a source of emf, as shown in the previous diagram. What will happen if the middle ...

and VB, respectively)? (A) IA = IB and VA = VB (B) IA = IB and VA = 4VB (C) IA = IB and VB = 4VA (D) IA = 4IB and VA = 4VB (E) I ...

Key Terms electric current current drift speed ampere resistance ohm Ω resistivity circuit direct current electromotive force (e ...

Summary Electric current is created when a potential difference (an electric field) set up between the ends of a piece of wire c ...

Chapter 12 Magnetic Forces and Fields In Chapter 9, we learned that electric charges are the source of electric fields and that ...

THE MAGNETIC FORCE ON A MOVING CHARGE If a particle with charge q moves with velocity v through a magnetic field B, it will expe ...

Notice that there are fundamental differences between the electric force and magnetic force on a charge. First, a magnetic force ...