A circuit breaker may need to switch short circuit currents as high as <u>fifteen (15)</u> times its rated current.
<u>Rated current</u> is basically the<u> maximum limiting current</u>. If the current exceeds its maximum limit, there will be overheating and, in severe circumstances, a <u>short circuit</u> will result.
A<u> circuit breaker</u> is a type of <u>electrical safety</u> device used to guard against short circuit damage to an electrical circuit.
An example of circuit breakers that are most frequently used in low voltage circuits is <u>Miniature Circuit Breakers</u> (MCBs).
These are the switches that automatically turn off when the current in a circuit exceeds the<u> safe limit</u>.
So, to ensure complete protection against <u>short circuits</u> & <u>overloading</u>, a circuit breaker may need to switch short circuit current as high as fifteen times its rated current.
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Answer:
Energy converted to heat and sound. Deformation of soil or ground may also take up some energy.
Explanation:
When the rock hits the ground, a part of the energy is converted to heat (thermal energy) and sound. If the ground is soft, it will be compressed by the rock when it lands. This deformation of the ground will take up some of the energy.
We can think of kinetic energy being transferred to the ground in the following way:
1. Ball hits the ground, and transfers kinetic energy to lots of soil particles.
2. Soil particles move a bit and transfer the energy to soil particles ahead of them.
3. Kinetic energy is transferred to a very large number of soil particles, and they move so little that we consider this vibration motion.
4. This small vibration motion is now considered as internal energy or 'heat'.
Answer:
3.0883 x 10^10mg
Explanation:
1 kilogram = 1000 000 milligrams
So, 30 883 x 1000 000 = 30 883 000 000mg
Answer:
(a)
(b) 5220 j
(c) 1740 watt
(d) 3446.66 watt
Explanation:
We have given mass m = 290 kg
Initial velocity u = 0 m/sec
Final velocity v = 6 m/sec
Time t = 3 sec
From first equation of motion
v = u+at
So
(a) We know that force is given by
F = ma
So force will be
(b) From second equation of motion we know that
We know that work done is given by
W = F s = 580×9 =5220 j
(c) Time is given as t = 3 sec
We know that power is given as
(d) Time t = 1.5 sec
So