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2 years ago

What is the resistance of a bulb of 4owconnected in a line of 220v?2

Physics

1 answer:

inn [45]2 years ago

8 0

Answer:

1210 ohm

Explanation:

Given :

P=40 W

V=220 V

Now,

$P=\frac{V^{2} }{R} \\40=\frac{(220)^{2} }{R} \\40R=48400\\R=\frac{48400}{40} \\R=1210 ohm$

Therefore, resistance of bulb will be 1210 ohm

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A tugboat tows a ship with a constant force of magnitude F1. The increase in the ship's speed during a 10 s interval is 3.0 km/h

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Answer:

The magnitude of F₁ is 3.7 times of F₂

Explanation:

Given that,

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$v=\dfrac{11\times10^{3}}{3600}$

$v=3.05\ m/s$

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$a_{3}=\dfrac{v}{t}$

$a_{3}=\dfrac{3.05}{10}$

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We need to calculate the factor of F₁ and F₂

Dividing force F₁ by F₂

$\dfrac{F_{1}}{F_{2}}=\dfrac{m\times0.83}{m\times0.22}$

$\dfrac{F_{1}}{F_{2}}=3.7$

$F_{1}=3.7F_{2}$

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What is the resistance of a bulb of 4owconnected in a line of 220v?2​

What is the resistance of a bulb of 4owconnected in a line of 220v?2