This discussion is now closed.
Check out other Related discussions
- HNC electrical engineering
- RLC circuit
- electrical schematics and analyzing signals
- ac theory question
- Superposition theorem problem
- Resistance of the LDR
- HNC Electrical engineering
- Confusing Capacitor question
- help! two quick Dc electricity questions
- Use a simulator to produce a resonance curve between 800 Hz and 4.5 kH
- Isaac physics C4a.2 - struggling
- Isaac Physics.
- Circuits Question
- In what circumstance would a variable resistor be unaccepted to vary voltage?
- Physics GCSE question
- HNC science
- Capacitor Question (PHYS)
- Capacitors
- HELP! How do i draw this diagram?
- Electricity question help
Circuit Question
The power supplies are the same. The bulbs have the same resistance and the ammeter has negligible internal resistance.
By what percentage does the ammeter reading, increase or decrease when the switch is closed? Or does it remain the same.
Please explain why.
Thanks very much,
Vazzyb. Rep available!
By what percentage does the ammeter reading, increase or decrease when the switch is closed? Or does it remain the same.
Please explain why.
Thanks very much,
Vazzyb. Rep available!
Ammeter reading will drop to zero.
If you apply Kirchoff 2 round the outside loop.
Sigma emf = 0
so PD across bulb =0
so current through ammeter =0
If you apply Kirchoff 2 round the outside loop.
Sigma emf = 0
so PD across bulb =0
so current through ammeter =0
Current now goes from E/3R to 2E/R. (Apply Kirchoff 2 around outside loop)
Related discussions
- HNC electrical engineering
- RLC circuit
- electrical schematics and analyzing signals
- ac theory question
- Superposition theorem problem
- Resistance of the LDR
- HNC Electrical engineering
- Confusing Capacitor question
- help! two quick Dc electricity questions
- Use a simulator to produce a resonance curve between 800 Hz and 4.5 kH
- Isaac physics C4a.2 - struggling
- Isaac Physics.
- Circuits Question
- In what circumstance would a variable resistor be unaccepted to vary voltage?
- Physics GCSE question
- HNC science
- Capacitor Question (PHYS)
- Capacitors
- HELP! How do i draw this diagram?
- Electricity question help
