Dc Circuits

1. There is a circuit with an emf source of 6.0V connected to a lamp and a current flow of 2.0A.
Assuming that the wires connecting the whole circuit is resistance free, what is the resistence of the lamp?

0Ω

2.0Ω

3.0Ω

6.0Ω

V=IR
R=V/I
R=6.0/2.0
R=3.0Ω

Explanation

V=IR
R=V/I
R=6.0/2.0
R=3.0Ω

About This Quiz

A quiz about dc circuits :D
just 5 Qns to test your understanding :D
pictures are all drawn by myself on paint :D

What is the total current of the circuit?

12.0A

6.0A

11.0A

I=VR
Total current= total of 3 currents for each branch of a parallel circuit
total current= 12/2 + 12/3 +12/6
= 12.0A

Explanation

I=VR
Total current= total of 3 currents for each branch of a parallel circuit
total current= 12/2 + 12/3 +12/6
= 12.0A

What is the effective resistance of the circuit?

12Ω

(11/3 )Ω

1Ω

0Ω

1/total resistance (parallel)= 1/r + 1/r + 1/r (r being the respective resistance)
in this case
1/effective resistance= 1/6 + 1/3 + 1/2
effective resistance = 1Ω

Explanation

1/total resistance (parallel)= 1/r + 1/r + 1/r (r being the respective resistance)
in this case
1/effective resistance= 1/6 + 1/3 + 1/2
effective resistance = 1Ω