Advertisements
Advertisements
प्रश्न
In a coil of resistance 100 Ω a current is induced by changing the magnetic flux through it. The variation of current with time is shown in the figure. The magnitude of change in flux through the coil is ______.
पर्याय
200 Wb
275 Wb
225 Wb
250 Wb
Advertisements
उत्तर
In a coil of resistance 100 Ω a current is induced by changing the magnetic flux through it. The variation of current with time is shown in the figure. The magnitude of change in flux through the coil is 250 Wb.
Explanation:
e = `(ΔPhi)/(Δt), I = 1/R(ΔPhi)/(Δt)`
I Δt = `(ΔPhi)/R` = Area under l - t graph, R = 100 ohm
∴ ΔΦ = `100 xx 1/2 xx 10 xx 0.5 = 250` Wb
APPEARS IN
संबंधित प्रश्न
Draw a schematic sketch of an ac generator describing its basic elements. State briefly its working principle. Show a plot of variation of
(i) Magnetic flux and
(ii) Alternating emf versus time generated by a loop of wire rotating in a magnetic field.
A rectangular coil having 60 turns and area of 0.4m2 is held at right angles to a uniform magnetic field of flux density 5 × 10-5T. Calculate the magnetic flux passing through it.
A metallic loop is placed in a nonuniform magnetic field. Will an emf be induced in the loop?
The magnetic flux linked with a coil of N turns of area of cross-section A held with its plane parallel to the field B is ______.
The unit of magnetic flux in SI is ______
A square of side L meters lies in the x-y plane in a region, where the magnetic field is given by `B = Bo(2hati + 3hatj + 4hatk)`T, where B0 is constant. The magnitude of flux passing through the square is ______.
A cylindrical bar magnet is rotated about its axis (Figure). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then
Consider a closed loop C in a magnetic field (Figure). The flux passing through the loop is defined by choosing a surface whose edge coincides with the loop and using the formula φ = B1.dA1 + B2.dA2 +... Now if we chose two different surfaces S1 and S2 having C as their edge, would we get the same answer for flux. Jusity your answer.
A circular coil of 1000 turns each with area 1 m2 is rotated about its vertical diameter at the rate of one revolution per second in a uniform horizontal magnetic field of 0.07T. The maximum voltage generation will be ______ V.
