PHYSICS HIGH SCHOOL

If 500 C of electric charge passed through a light bulb in 2 min; what is the magnitude of the average electric current passing through the bulb?

Answers

Answer 1

Answer:

4.17 A

Explanation:

Charge is given as the product of current and time hence expressed as

Q=It

Where Q is charge in Cuolombs, I is current in Amperes and t is time in seconds

Making current, I the subject of the formula then

I=Q/t

Conversion

1 minute has 60 seconds

2 minutes will have 2*60=120 seconds

Substituting 120 s for t and 500 C for Q then

I=500÷120=4.1666666666666666666666666666666666666666

Rounded off, current is approximately 4.17A

Related Questions

Iron has a mass of 7.87 g per cubic centimeter of volume, and the mass of an iron atom is 9.27 × 10-26 kg. If you simplify and treat each atom as a cube, (a) what is the average volume (in cubic meters) required for each iron atom and (b) what is the distance (in meters) between the centers of adjacent atoms?
What's the value of 57,281 joules in Btu
What is the difference between the deviation and refraction?
It would be appreciated if all questions were answered and have shown work. :)1. While skiing, Sam flies down a hill and hits a jump. He has a mass of 75 kg, and he leaves the jump at 18 m/s. What is his momentum as he leaves the jump?2. How fast would a 0.25 kg football have to be traveling to have the same momentum as a 0.05 kg bullet travelling 500 m/s?3. Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her seat-belt stops her from flying forward, bringing her to rest in 0.5 seconds. How much force did the seat-belt put on Sarah?
What is the acceleration of a 5.9 kilogram bowling ball if a force of 11 N is applied to it?

A child is sending pulses down a stretched rope at a rate of 2 pulses per second. The distance between the pulses is 5 meters. What is the speed of the wave?a. 5 m/s
c. 2 Hz
b. 10 m/s
d. 2.5 m/s User: Longitudinal seismic waves are known as
a. primary waves.
b. secondary waves.
c. surface waves.
d. transverse waves.

Answers

Wave speed = (wavelength) x (frequency)

= (5 meters) x (2 per second)

= 10 meters per second .

Assuming 70% of Earth's surface is covered in water at an average depth of 2.5 mi, estimate the mass of the water on Earth in Kilograms.

Answers

This is an excellent question that i do not have the answer to.

A kettle transfers 1500 J of energy, 1200 J to a thermal energy store and 300 J to a vibrational energy store (sound). How efficient is the kettle?

Answers

Answer: 0.8

Explanation:

The efficiency is defined as the ratio of total imput energy that is actually utilized to the end of the device.

So if we have a total transfer of 1500j of energy, and 1200j are used to heat the thing inside the kettle, 300j are not used to the actual function of the kettle.

So the efficiency is n = 1200j/1500j = 0.8

This means that a 80% of the energy imput is actually used to heat the kettle.

Final answer:

To calculate the efficiency of the kettle, divide the useful output energy (1200 J) by the total input energy (1500 J) and multiply by 100%. This results in an efficiency of 80%, meaning 80% of the energy was converted into useful thermal energy.

Explanation:

In order to find the efficiency of the kettle, we need to compute the ratio of the useful output energy to the total input energy and then multiply by 100% to convert the decimal to a percentage. In this case, the useful output energy is the 1200 J transferred to the thermal energy store. The total input energy is the total energy transferred by the kettle which is 1500 J. So, the efficiency of the kettle is (1200 J / 1500 J) * 100% = 80%.

The remaining 20% energy is wasted and was transferred to the vibrational (sound) energy store, which is a non-useful energy output. An efficient appliance is one which converts a higher proportion of the input energy into useful output energy, with less of it wasted. In this case, 80% of the energy from the kettle was converted into useful thermal energy, hence the kettle is quite efficient.

Learn more about Efficiency here:

brainly.com/question/33283760

#SPJ3

A ball is thrown into the air at some angle. At the very top of the ball's path, its velocity isa. entirely vertical.
b. There's not enough information given to determine.
c. both vertical and horizontal.
d. entirely horizontal.

Answers

When the ball should be thrown into the air so the velocity of the ball should be entirely horizontal.

The following information should be considered:

The object should continue for travel having a similar velocity till the external force should be applied.
Also, no external forces should be there in the case when it is horizontal direction except air resistance.
The gravity force should be downwards at 9.8m/s^-2 towards the ground. At the time when the ball is at the highest point so the ball stops so, it can't be vertical.

Therefore, we can conclude that when the ball should be thrown into the air so the velocity of the ball should be entirely horizontal.

Learn more: brainly.com/question/17127206

Entirely horizontal.

An object will continue to travel with the same velocity unless an external force is applied.
There are no external forces acting in the horizontal direction (except air resistance but the is negligable) so the ball will move in the horizonontal direction with with same speed at all times.
Force of gravity is acting downwards, meaning it is constantly acelleraring at 9.8ms^-2 towards the ground. When the ball reaches its heighest point, it is where the ball has stopped moving up and starts to move down, therfore it is not moving vertically at all.

If a step-up transformer has a primary coil with 15 turns, how many turns would be required in the secondary coil in order to increase the voltage from 80 volts to 160 volts? A. 8 turns B. 30 turns C. 80 turns D. 160 turns