$B_{1}, B_{2}$ and $B_{3}$ are three identical bulbs connected as shown in Figure 12.8. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
How much power is dissipated in the circuit when all the three bulbs glow together?

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Solution

Hint: Try to establish relation between Power consumed, voltage of source and net current flowing in the circuit.

Step 1 : Find power consumed by the combination

Given that,
A current of $3 A$ flows in the circuit and voltage of source is $4.5 V$
We know,
$P = V \times I_{n e t}$
$∴ P = 4.5 V \times 3 A = 13.5 W$

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Similar questions

B_{1}, B_{2}

and

B_{3}

are three identical bulbs connected as shown in Figure 12.8. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
What happens to the glow of the other two bulbs when the bulbs

B_{1}

gets fused?

Question 28 (i)
$B_{1}, B_{2}$ and $B_{3}$ are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
(i) What happens to the glow of the other two bulbs when the bulb $B_{1}$ gets fused?

Question 28 (ii)
$B_{1}, B_{2}, a n d B_{3}$ are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
(ii) What happens to the reading of $A_{1}, A_{2} A_{3}$ and A when the bulb $B_{2}$ gets fused?

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

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B1,B2 and B3 are three identical bulbs connected as shown in Figure 12.8. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.How much power is dissipated in the circuit when all the three bulbs glow together?

Hint: Try to establish relation between Power consumed, voltage of source and net current flowing in the circuit.Step 1 : Find power consumed by the combination Given that, A current of 3A flows in the circuit and voltage of source is 4.5 V We know, P=V×Inet ∴P=4.5 V×3 A=13.5 W

$B_{1}, B_{2}$ and $B_{3}$ are three identical bulbs connected as shown in Figure 12.8. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
How much power is dissipated in the circuit when all the three bulbs glow together?