Ask question

Ask question

All categories

3 years ago

13

If we double the resistance in a circuit but keep the current in it constant, the power dissipated by that circuit will

1 answer:

7nadin3 [17]3 years ago

5 0

By definition, the power is equal to the product of the current high squared by the value of the resistance.
In other words:
P = I ^ 2 * R
where,
I: Current
R: resistance
If we double the resistance in a circuit but keep the current in it constant, then:
P = (I ^ 2) * (2 * R)
P = 2 * (I ^ 2 * R)
The power increases twice.
answer:
The power dissipated by that circuit will increase twice

You might be interested in

What term is used to describe DNA Replication?

ad-work [718]

Answer:

Semi-conservative

Explanation:

Each strand of the original DNA molecule serves as a template for the production of its counterpart

3 0

3 years ago

A devout halloweener not only dressed as an astronaut, but travelled to the moon for the full experience. The astronaut jumps on

nikdorinn [45]

Answer:

2.78 m

Explanation:

At the peak, the velocity is 0.

Given:

a = -1.6 m/s²

v₀ = 2.98 m/s

v = 0 m/s

x₀ = 0 m

Find:

x

v² = v₀² + 2a(x - x₀)

(0 m/s)² = (2.98 m/s)² + 2(-1.6 m/s²) (x - 0 m)

x = 2.775 m

Rounded to 3 sig-figs, the astronaut halloweener reaches a maximum height of 2.78 meters.

5 0

3 years ago

If the work put into a lever is 25.0 joules and the work done by the lever is 20.0 joules, what is the efficiency of the lever?

Liula [17]

The efficiency is Wout/Win = 25/20

5 0

3 years ago

Read 2 more answers

What two quantities affect the force of attraction between two charges

miss Akunina [59]

1. the amount of electric charge that they carried
2. the distance between them

5 0

3 years ago

Read 2 more answers

Light that has a wavelength of 600 nm strikes a metal surface, and a stream of electrons is ejected from the surface. If light o

Anni [7]

Answer:

The maximum kinetic energy of the electrons emitted from the surface will be greater.

Option 3 is correct.

Explanation:

Given that,

Wavelength $\lambda_{1}=600\ nm$

Wavelength $\lambda_{2}=500\ nm$

We need to calculate the energy for first wavelength

Using formula of energy

$E=hf$

$E=h\dfrac{c}{\lambda}$

Put the value into the formula

$E_{1}=6.67\times10^{-34}\times\dfrac{3\times10^{8}}{600\times10^{-9}}$

$E_{1}=3.33\times10^{-19}\ J$

We need to calculate the energy for second wavelength

Put the value into the formula

$E_{2}=6.67\times10^{-34}\times\dfrac{3\times10^{8}}{500\times10^{-9}}$

$E_{2}=4.002\times10^{-19}\ J$

So, E₂>E₁

Hence, The maximum kinetic energy of the electrons emitted from the surface will be greater.

8 0

3 years ago