All categories

3 years ago

A certain device in a 120-V circuit has a current rating of 20 A. What is the resistance of the device (how many ohms)?

Physics

1 answer:

Akimi4 [234]3 years ago

5 0

Answer:

R = 60 Ω

Explanation:

given,

Potential of the certain device, V = 120 V

current rating of the circuit, I = 20 A

resistance of the device, R = ?

Using Ohm's Law

V = I R

$R = \dfrac{V}{I}$

$R = \dfrac{120}{20}$

R = 60 Ω

hence, the resistance of the device is equal to 60 Ω

You might be interested in

QUESTION 5

Fiesta28 [93]

Answer:

D) sudden and irresistible on sets of sleep during normal waking periods

Explanation:

D because Narcolepsy (sudden and irresistible on sets of sleep during normal waking periods) is a part of insomnia

8 0

3 years ago

How do cranial nerves transmit information to the senses?

Amiraneli [1.4K]

It transmits threw the neurons

5 0

3 years ago

Read 2 more answers

When does the transfer of thermal energy end?

Dahasolnce [82]

Answer:

I think when the object transferring the thermal energy reaches the same temp as the object absorbing it

Explanation:

6 0

3 years ago

Salmon often jump waterfalls to reach their

PilotLPTM [1.2K]

The minimum velocity of the Salmon jumping at the given angle is 12.3 m/s.

The given parameters;

height of the waterfall, h = 0.432 m
distance of the Salmon from the waterfall, s = 3.17 m
angle of projection of the Salmon, = 30.8º

The time of motion to fall from 0.432 m is calculated as;

$h = v_0_y + \frac{1}{2} gt^2\\\\0.432 = 0 + (0.5\times 9.8)t^2\\\\0.432 = 4.9t^2\\\\t^2 = \frac{0.432}{4.9} \\\\t^2 = 0.088\\\\t = \sqrt{0.088} \\\\t = 0.3 \ s$

The minimum velocity of the Salmon jumping at the given angle is calculated as;

$X = v_0_x t\\\\3.17 = (v_0\times cos(30.8)) \times 0.3\\\\10.567 = v_0\times cos(30.8)\\\\v_0 = \frac{10.567}{cos(30.8)} \\\\v_0 = 12.3 \ m/s$

Thus, the minimum velocity of the Salmon jumping at the given angle is 12.3 m/s.

Learn more here: brainly.com/question/20064545

8 0

2 years ago

Why is the escape speed for a spacecraft independent of the spacecraft's mass?

scoray [572]

In order to escape the gravitational pull of our planet, any object must have an escape velocity of 7 km/s or more, anything lower than that will be slowed down by the pull of gravity, and will eventually returned to the surface of our planet. It is independent of mass, any lighter or heavier object must attain the required escaped velocity to reach space.

7 0

3 years ago