Question help

Could someone work out the total resistance for this circuit I’m a bit confused and got an answer but just would like to check if I’m correct D27DE179-94A1-442E-878B-BF63AA9572A1.jpg.jpeg

D27DE179-94A1-442E-878B-BF63AA9572A1.jpg.jpeg

Reply 1

RogerOxon

Original post by Baileymck1

Could someone work out the total resistance for this circuit I’m a bit confused and got an answer but just would like to check if I’m correct D27DE179-94A1-442E-878B-BF63AA9572A1.jpg.jpeg

Please post your answer. It should be between 2 and 3 Ohms (I won't post the exact answer).

(edited 3 years ago)

Reply 2

Baileymck1

I thought it might’ve been either 15 ohms or 3.6ohms but not sure , could you help ?

Reply 3

Baileymck1

Ignore that I ment 15 ohms or 2.4 ohms

Reply 4

RogerOxon

Original post by Baileymck1

I thought it might’ve been either 15 ohms or 3.6ohms but not sure , could you help ?

There are two parallel paths - the 3 Ohm and the two (series) 6 Ohms. Does that help?

Reply 5

RogerOxon

Original post by Baileymck1

Ignore that I ment 15 ohms or 2.4 ohms

One of those is correct.

You have a 3 Ohm resistor in parallel with another resistance. The total resistance cannot be greater than that of the lowest parallel resistance.

Reply 6

Baileymck1

Thanks I get it now 🙏🏻

Reply 7

Baileymck1

Could you also help with this question , sorry I’m doing this homework and I’m so bad at physics 😂 1A142052-2424-4EF5-B65E-8D3C18F59828.jpg.jpeg

Reply 8

Baileymck1

I thought it was 2 ms per div but it’s 3 marks so there must be some working

Reply 9

RogerOxon

Original post by Baileymck1

I thought it was 2 ms per div but it’s 3 marks so there must be some working

How many divisions is a complete cycle?
At 50Hz, how long is a single cycle? (Hint: It's tens of ms)

Reply 10

Baileymck1

Sorry I’ve lost you I still don’t get it 😂

Reply 11

Baileymck1

Could you give any further help on that question ? , as I’m still confused on what to do

Reply 12

RogerOxon

Original post by Baileymck1

Could you give any further help on that question ? , as I’m still confused on what to do

A complete cycle of the wave is 2 divisions.

50Hz is 50 cycles per second, so the period of the wave is 1000ms / 50 (note that this is NOT 2ms).

Can you take it from there?