14. D.C. Circuits

Question 1

What is the difference of A.C. circuit and D.C. circuit?

Answer 1

DC: Current only flow one direction, applied voltage is quite low
AC: Current changes 50/60 times per second, applied voltage is quite high

Question 2

Explain what a Closed circuit is

Answer 2

Where the closed loop path connects all the component together

Question 3

Explain what a short circuit is

Answer 3

Where a circuit is open as there is large or infinite resistance in the path

Question 4

Explain what a short circuit is

Answer 4

A short circuit path is a low resistance path

Question 5

Explain what a Series circuit is?

Answer 5

1. Current is same at every point
2. Total Potential difference (V) equals to the sum of potential difference in the circuit
3. Total effective resistance (R) is equal to the sum of the individual resistance

Question 6

Parallel circuit

Answer 6

1. In parallel circuit the total current flowing into or out of the parallel branches equal to the sum of individual currents in each branch
2. In a parallel circuit, potential difference (V) is the same across all branches
3. The reciprocal of effective resistance (1/R) is equal to the sum of the reciprocal of individual resistances

Question 7

Compare series circuit and parallel circuit in terms of voltage

Answer 7

Series: V across the bulbs in the series connection is half the V of the emf of the dry cell
Parallel: V across each bulb in the parallel branch is identical to each other

Question 8

Compare Series circuit and parallel circuit in terms of current

Answer 8

Series: Current is the same at every point of the circuit
Parallel: Current splits across different parallel branches

Question 9

Compare series circuit and parallel circuit in terms of a Scenario based.

Answer 9

Series: If one bulb blows up, the others would not lit up as well
Parallel: If one of the bulbs blows, the others will remain lit.

Question 10

What are the advantages and disadvantages of series circuit?

Answer 10

1. (Pro): It achieves higher resistance
2. (Con): Affects the other components along the same line

Question 11

What are the advantages and disadvantages of parallel circuit

Answer 11

1. (Pro): It does not affect other components if one is damaged
2. (Con): Current varies when more branches are added