Answer:
The Resultant Induced Emf in coil is 4∈.
Explanation:
Given that,
A coil of wire containing having N turns in an External magnetic Field that is perpendicular to the plane of the coil which is steadily changing. An Emf (∈) is induced in the coil.
To find :-
find the induced Emf if rate of change of the magnetic field and the number of turns in the coil are Doubled (but nothing else changes).
So,
Emf induced in the coil represented by formula
∈ = 
...................(1)
Where:
. 
{ B is magnetic field }
{A is cross-sectional area}
. 
No. of turns in coil.
. 
Rate change of induced Emf.
Here,
Considering the case :-
& 
Putting these value in the equation (1) and finding the new emf induced (∈1)
∈1 =
∈1 =
∈1 =![4 [-N\times\frac{d\phi}{dt}]](https://tex.z-dn.net/?f=4%20%5B-N%5Ctimes%5Cfrac%7Bd%5Cphi%7D%7Bdt%7D%5D)
∈1 = 4∈ ...............{from Equation (1)}
Hence,
The Resultant Induced Emf in coil is 4∈.
Answer:
The most likely items to be used are;
Ultrasound and X-rays
Explanation:
A routine visit to a dentist consists of two areas of activities, including;
a) Dental examination and check up
b) Oral prophylaxis, and dental cleaning
The dental examination may involve the use of X-rays, which allow the detection of cavities between the teeth
The dental cleaning can be carried out with the use of an ultrasound cleaner, which allow the cleaning of sensitive teeth without hurting the patient
Therefore, the items most likely to be used during a routine dental visit are ultrasound and X-rays
Answer:
The speed of the raft is 1.05 m/s
Explanation:
The equation for the position of the stone is as follows:
y = y0 + v0 · t + 1/2 · g · t²
Where:
y = height of the stone at time t
y0 = initial height
v0 = initial speed
t = time
g = acceleration due to gravity
The equation for the position of the raft is as follows:
x = x0 + v · t
Where:
x = position of the raft at time t
x0 = initial position
v = velocity
t = time
To find the speed of the raft, we have to know how much time the raft traveled until the stone reached the river. For that, we can calculate the time of free fall of the stone:
y = y0 + v0 · t + 1/2 · g · t² (v0=0 because the stone is dropped from rest)
If we place the origin of the frame of reference at the river below the bridge:
0 m = 95.6 m - 9.8 m/s² · t²
-95.6 m / -9,8 m/s² = t²
t = 3.12 s
We know that the raft traveled (4.84 m - 1.56 m) 3.28 m in that time, then the velocity of the raft will be:
x/t = v
3.28 m / 3.12 s = v
v = 1.05 m/s
Answer:
Solar flare
Explanation:
In the Sun when there is an sudden increase in brightness which is generally accompanied by a coronal mass ejection it is known as a solar flare. Solar flares occur close to Sun spot.
Coronal mass ejection is the release of matter (plasma) with a strong magnetic field from the corona of the Sun.
The energy they release ranges between 
which is comparable to 100-megaton hydrogen bombs exploding simultaneously
The modern state of Israel was created in 1948.
a). no; the Sinai war was 8 years later
b). no; the Camp David accords were hammered out 30 years later
c). no; the Yom Kippur war broke out 25 years later.
d). yes. Following World War II (ended in 1945), the UN voted and
passed resolutions to Partition the British Mandate in Palestine.
The authorities in the Jewish partition at that time accepted the
partition plan, and declared Israel a sovereign state as soon as
it took effect.
The authorities in the Arab partition at that time rejected the partition
plan. They got together with some of their buddies in other nearby
countries who were not even affected by the plan, and together,
their combined armies rolled toward Israel as soon as the plan
took effect. Their intention was to undo Israel as an independent
country. Strange as it may seem, although Israel didn't even have
an army yet, the invading armies failed that time. And though it
may seem even stranger than that, even now ... 68 years later ...
they still don't accept Israel's existence, and they still plan to get rid
of it, and they still incite their people and teach their children to hate
Israel and all Jews in general.
