Solve Circuit Questions: 5k Ohm Internal Resistance & 2000 kW Peak Power Output

  • Thread starter Thread starter CL39
  • Start date Start date
  • Tags Tags
    Circuit
AI Thread Summary
To convert a meter with a 5k Ohm internal resistance and a full scale of 50 microA into a 1000 range voltmeter, a resistance of 19.95 mega Ohm must be added in series. For the electrical supply line loading question, when the voltage is reduced from 480V to 240V while maintaining a peak power output of 2000 kW, the supply line losses will increase by a factor of four. The discussion also touches on the importance of proper forum etiquette, questioning the placement of the topic in the correct section. Overall, the thread emphasizes the calculations needed for electrical measurements and the implications of voltage changes on power loss.
CL39
Messages
8
Reaction score
0
1. An electrical meter has an internal resistance of 5k Oh, and registers full scale of 50 microA. How many mega Ohm to insert in series to turn meter into a 1000 range voltmeter?

2. An electrical supply line loading question. Some large piece of electrical equipment ahs a peak power output of 2000 kW. If this is maintained, but voltage changed from 480V to 240V, by what ratio will supply line losses change


Thank you.
 
Last edited:
Physics news on Phys.org
Are you a meter man?
 
As opposed to a meter maid?
Why isn't this posted in the Homework section? Does anybody ever read the rules?
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Electric power and internal resistance
Replies
4
Views
1K
Finding Optimal Fixed Resistor for Potential Divider Circuit
Replies
45
Views
4K
EMF and internal resistance laboratory work
Replies
4
Views
2K
Power in Circuit: Calculating Output of 12V Supply
Replies
3
Views
3K
Internal voltage and resistance of a power supply
Replies
13
Views
12K
Maximizing Power Efficiency: Solving for Power Factor in RL Circuit
Replies
2
Views
2K
Engineering Diodes limiting circuit question?
Replies
3
Views
2K
Engineering Question about dc to ac circuits in solar panels?
Replies
7
Views
2K
TEG&Li+ batteries to power data collection sensors
Replies
1
Views
1K
More Voltage Woes: Solving Electrical Circuit Problems
Replies
8
Views
4K

Hot Threads

Recent Insights

Back
Top