Resistors Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is a resistor?

A

Anything which can reduce the flow of current in a circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does ohms law say?

A

As current increases, p.d also increases (given that temperature in the circuit stays the same)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In a Current and p.d graph which one is the x and y axis?

A

Y=Current X=Voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Does a filament bulb follow ohm’s law and what does the I/V graph look like?

A

No, it increase steeply and then starts decreasing the rate at which is increasing making a gentler slope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does resistance in a bulb increasing affect the current?

A

When current increases its temperature increases too

Atoms vibrate more and more in the filament bulb

This makes it harder for the electric charge to get through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a normal diode in terms of bias?

A

Forward biased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a flipped diode in terms of bias?

A

Reverse biased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does a graph of I/V look in a diode look like?

A

It’s zero until a little after hitting origin where it spikes up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does the resistance in a thermistor change and how does it affect it?

A

By temperature, as resistance decreases temperature increases (inversely proportional)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are some uses of thermistors?

A

Fire alarms, thermostats

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How does resistance change in a Light Dependant Resistor and how?

A

Dark=High resistance bright=low resistance (inversely proportional)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Uses of LDR?

A

Automatic lights, automatic camera flashes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which measures is connected in series and which one in parallel?

A

Ammeter=series voltmeter=parallel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly