3 years ago

What is the resistance of a bulb of 40w connected in a line of 70v

Physics

1 answer:

olga55 [171]3 years ago

4 0

Answer:

122.5 ohm

Explanation:

Given :

P=40 w

V= 70 V

R=?

Resistance can be calculated as :

$P=\frac{V^{2} }{R} \\40=\frac{(70)^{2} }{R}\\40=\frac{4900}{R} \\R=\frac{4900}{40} \\R=122.5 ohm$

Therefore, resistance of the bulb will be 122.5 ohm

You might be interested in

What is the acceleration of a car that is going at a steady speed of 60 mph?

PilotLPTM [1.2K]

Answer:

Explanation: you are only accelerating if you are slowing down, speeding up, or changing direction

8 0

3 years ago

What is a circuit,s resistance if 12v produces 2A of current ?

Arlecino [84]

We have to find the resistance.
V = 12
A = 2
R = ?
And then we divide it to find r.
12/2 = 6 ohm's.

7 0

3 years ago

A flagpole consists of a flexible, 7.107.10 m tall fiberglass pole planted in concrete. The bottom end of the flagpole is fixed

vladimir1956 [14]

To develop this problem we require the concepts related to Frequency and their respective way of calculating it.

The formula to calculate the frequency is given by

$f=\frac{V}{\lambda}$

Where,

$\lambda = wavelength$

$V= velocity$

For fundamental mode, wavelength is equal to 4 time the length.

Then,

$\lambda = 4L = 4*7.10m=28.4m$

Replacing in the first equation,

$f=\frac{2730}{28.4}\\$

$f= 96.12Hz$

Therefore the frequency is 96.12Hz

3 0

3 years ago

A 5kg goes from 4m/s to 20m/s determine the change in momentum

lukranit [14]

Answer:

i might know the answer to this, so can you help me with my question too?

Explanation:

5 0

3 years ago

A 2.0 g identification reflector glued to one end of a helicopter rotor is spinning at a tangential velocity of 2093 m/s. The re

katrin2010 [14]

372863 juusnjus bhhhanbubhgajhus

7 0

3 years ago

What is the resistance of a bulb of 40w connected in a line of 70v​

What is the resistance of a bulb of 40w connected in a line of 70v