Flashcards in Exam 3 Deck (32)

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1

## What is the EMF of a battery?

### The maximum potential difference between the terminals of the battery.

2

## What happens as a dry cell ages?

### It's resistance goes up

3

## In a series circuit what happens with current and voltage through all the elements?

###
-Current is the same across all the elements.

-Voltage is divided across each of the elements.

4

## In a parallel circuit what happens with current and voltage through all the elements?

###
-Current gets divided across each element

-Voltage is the same across all elements

5

## Series circuit is a _____ divider and a parallel circuit is a _____ divider.

###
Series is a voltage divider

Parallel is a current divider

6

## Kirchhoff's voltage rule is an example of conservation of energy. True or False?

### True

7

## Does a capacitor charge linearly?

### No it does not. It's a non-linear equation.

8

## In an RC circuit as the switch is closed what happens to the charge and voltage across the resistor?

### Both start increasing with time.

9

## What is terminal voltage?

### The potential difference between the terminals of a battery

10

## In a series circuit is the current the same throughout each resistor?

### Yes the current is the same in a series circuit.

11

## Kirchhoff's junction rule is a statement of

### the law of conservation of charge

12

## Kirchhoff's loop rule is a statement of

### the law of conservation of charge

13

## the capacitor _____ the current through while charging and discharging but ____ when fully charged.

###
Allows current during charging/discharging

Does not allow current when fully charged

14

## Voltmeters should have an internal resistance of

### Infinite

15

## Ammeters should have an internal resistance of

### 0

16

## What field is continuous, magnetic or electric?

### Magnetic field is continuous

17

##
Using the right hand rule:

Current in +Y direction, what is the direction of the magnetic field?

###
Counterclockwise around y axis.

Thumb points in direction of current, fingers point in direction of magnetic field.

18

## The force on a current-carrying wire in a magnetic field is equal to zero when _____

###
the current is parallel to the field lines

F = ILBsin0

19

## The force on a current-carrying wire in a magnetic field is the strongest when

###
the current is perpendicular to the field lines.

20

## The sign of the charge carriers in a current can be determined using the

### Hall effect

21

## A charged particle traveling opposite to a magnetic field does not experience a magnetic force. T/F

### True

22

## Can magnetic field lines cross?

### Never

23

## The field outside a solenoid behaves like

### the field of a bar magnet

24

## Currents in the same direction in parallel wires produce

### an attractive force

25

## Currents in the opposite direction in parallel wires produce

### a repulsive force

26

## Using ampere's law, the integral must be evaluated _____

### around a closed path

27

## Ampere is defined as

### using the force between current carrying wires

28

## Magnetic field between two parallel wires with current in same direction have a magnetic field at the midpoint of?

###
Zero

Keyword parallel and current in same direction

29

## The magnetic permeability of a ferromagnetic material is

### Much greater than Uo

30