Three incandescent bulbs (each 100 W) are attached in series. In another circuit, three more bulbs of same wattage are attached parallelly to an equal source. Give reasons.

A circuit can only be connected in series if same amount of current passes via the resistors. In every circuit, the amount of voltage across the resistors will be different. Simply put, in a series combination, if even one of the resistors is broken or turns out faulty, then the entire circuit turns off.

Will the bulb in the two circuits have the same brightness?

The bulbs’ resistances in series combination will have to be three times the resistance of one bulb alone. Therefore, the current that passes in the series combination will have to be about one-third in opposition to the current in each bulb in a parallel combination. Hence, it can be said that in parallel combination, the bulbs will glow brighter.

With one bulb fused, will the rest continue to glow in each circuit?

In series combination, the bulbs will gradually stop glowing due to the broken or faulty circuit and will have zero current. However, if the bulbs continue in parallel combination, then they will glow with the same brightness as earlier.

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CBSE CLASS XII Related Questions

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Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

The total charge of the two spheres is conserved.
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Consider the nuclear reaction $ X \to Y + Z $. Let $ M_x $, $ M_y $, and $ M_z $ be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

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This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

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Read the following paragraph and answer the questions that follow.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.

Three incandescent bulbs (each 100 W) are attached in series. In another circuit, three more bulbs of same wattage are attached parallelly to an equal source. So, give reasons for the following.

Will the bulb in the two circuits have the same brightness?

With one bulb fused, will the rest continue to glow in each circuit?

Related Questions

CBSE CLASS XII Related Questions

1.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

Similar Physics Concepts

Comments

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Three incandescent bulbs (each 100 W) are attached in series. In another circuit, three more bulbs of same wattage are attached parallelly to an equal source. So, give reasons for the following.

Will the bulb in the two circuits have the same brightness?

With one bulb fused, will the rest continue to glow in each circuit?

Related Questions

CBSE CLASS XII Related Questions

1.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?