Generate Quiz 6997FF329EBC0

Magnetic flux ΦB = BAcos
Alternatively, we can say that ΦB = B.A. since it is a dot product.

where A is the area vector and B is the magnetic field vector.
A dot product’s answer is always a scalar. Therefore, choice A is the right one.

The formula ω = qB/m provides the angular frequency (ω) during circular motion in a magnetic field, where:

The particle’s mass is denoted by m, the magnetic field strength by B, the charge by q, and the angular frequency by ω.
This formula demonstrates that the angular frequency is inversely proportional to the particle’s mass and directly proportional to the product of the charge and the magnetic field strength. It shows how quickly the particle in the magnetic field rotates or oscillates. A greater mass will result in a lower angular frequency, whereas a higher charge or stronger magnetic field will result in a higher angular frequency.

The dot product of the area vector (A) and the magnetic field vector (B) yields the flux (Φ):

Φ = B ⋅ A

We can compute the dot product using the formulas B = (i + 2j + k) and A = (2i + j + k):

Φ = (i + 2j + k) ⋅ (2i + j + k)

= 2j⋅2j + k.k + 2i⋅i

= 2 + 2 + 1

= 5.

Consequently, the associated flux is 5 wb (Weber).

F = q [E + (v × B)]

F = 2.5 [ 5 + (1.5 × 7.25) ]

F = 2.5 [ 5 + 10.875 ]

F = 2.5 × 15.875

F = 39.68

Option A is the right choice because this is a numerical question with only one possible response.

NBA / BA is the flux.

Thus, the area is

pi x r 2 i.e 3.142 x 4 flux = 100 x 3.142 x 4

= 1296 Wb

which is 1296 Wb, the closest to option A.

Since it’s a number, there is only one right answer.

E = ½ L x I2

where I stands for current, L for inductance, and E for stored energy.

E = ½ (2×10-3)(2)2.

E = 4 mJ

When a machine’s parts rotate, friction losses occur.

There is no frictional loss in a transformer regardless of the loading condition because it is a static device, meaning it has no moving parts of any kind.

Therefore, choice D is the right one.

Self-induction is the ability of the same coil to induct e.m.f. when the current flowing through it changes.