Three identical bulbs, B1, B2 and B3 connected. Current of 3A is recorded by the ammeter when the bulbs glow.

Three identical bulbs, B1, B2 and B3 connected. A current of 3A is recorded by the ammeter when the bulbs glow. What happens when:

To the glow of the other two bulbs when one of them gets fused?

Assuming that B₁ is fused, there supposedly will be no impact on the other two bulbs. The two bulbs will remain the same since they are dependent on the power. This happens because the potential difference and resistance of the other two bulbs remain the same, and do not get affected by an external fuse of another bulb.

To the reading of A1, A2, A3 and A when the bulb B2 gets fused?

Considering that there are parallel connections, the net resistance should be:

1/R = 1/R₁+ 1/R₂+ 1/R₃

Now, since the resistance remains same, thus, R’ = R/3

Hence, according to Ohm’s Law,

V = IR

Thus,

R = 4.5Ω

Assuming that B₂ is fused, two bulbs, B₁ and B₃, remain parallel

Therefore, the net resistance in parallel combination is = 1/R’ = 2/R

⇒ R’ = 4.5/2 Ω

⇒ I = V/R’

⇒ I = 2 × 4.5 / 4.5

⇒ I = 2A

The distribution of current in both the bulbs will be1 A each.

How much power is dissipated in the circuit when all the three bulbs glow together?

The amount of power that is dissipated when all the three bulbs glow together:

P = V × I

Therefore, after replacing the values, we get,

P= 4.5 × 3

⇒ P = 13.5 W

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Three identical bulbs, B1, B2 and B3 connected. Current of 3A is recorded by the ammeter when the bulbs glow.

To the glow of the other two bulbs when one of them gets fused?

To the reading of A1, A2, A3 and A when the bulb B2 gets fused?

How much power is dissipated in the circuit when all the three bulbs glow together?

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1.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

2.
A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of 60° in 0.2 s. The value of emf induced in the loop will be:

3.
Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

4.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

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If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

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Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

Similar Physics Concepts

Comments

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Three identical bulbs, B1, B2 and B3 connected. Current of 3A is recorded by the ammeter when the bulbs glow.

To the glow of the other two bulbs when one of them gets fused?

To the reading of A1, A2, A3 and A when the bulb B2 gets fused?

How much power is dissipated in the circuit when all the three bulbs glow together?

CBSE CLASS XII Related Questions

1.A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

2.A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of 60° in 0.2 s. The value of emf induced in the loop will be:

3.Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

4.Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

5. If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

6.Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

2.
A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of 60° in 0.2 s. The value of emf induced in the loop will be:

3.
Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

4.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

5.
If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

6.
Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.