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Test: Inductance in Terms of Flux Linkages Per Ampere - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: Inductance in Terms of Flux Linkages Per Ampere

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Test: Inductance in Terms of Flux Linkages Per Ampere - Question 1

Among the following, which is the right formula for inductance?

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 1

The average emf induced is proportional to the current per unit time, the constant of proportionality being L. Hence emf=LI/t. Making L the subject of the formula, we get: L=emf*t/I.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 2

Among the following, which is the right formula for inductance?

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 2

We know that:
emf=L(i2-i1)/t
Inductance = L=NΦ/t.

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Test: Inductance in Terms of Flux Linkages Per Ampere - Question 3

For a coil having a magnetic circuit of constant reluctance, the flux is ___________ to the current.

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 3

For a coil having a magnetic circuit of constant reluctance, the flux is directly proportional to the current.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 4

For a coil having a magnetic circuit of constant reluctance, if the flux increases, what happens to the current?

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 4

For a coil having a magnetic circuit of constant reluctance, the flux is directly proportional to the current. Hence as the flux increases, the current also increases.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 5

The unit for inductance is ___________

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 5

The unit of induction is named after a famous scientist Joseph Henry who independently discovered electromagnetic induction.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 6

If either the inductance or the rate of change of current is doubled, the induced e.m.f?

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 6

If either the inductance or the rate of change of current is doubled, the induced e.m.f. becomes double because, emf=LI/t.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 7

 If the current changes from 5A to 3A in 2 seconds and the inductance is 10H, calculate the emf.

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 7

We know that:
emf=L(i2-i1)/t
Substituting the values from the question, we get emf=10V.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 8

If the current changes from 5A to 3A in x sec and inductance is 10H. The emf is 10V, calculate the value of x.

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 8

We know that:
emf=L(i2-i1)/t
Substituting the values from the question, we get x=2s.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 9

If the current changes from 3A to 5A in 2s and the emf is 10V. Calculate the inductance.

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 9

We know that:
emf=L(i2-i1)/t
Substituting the values from the question we get L=10H.

Test: Inductance in Terms of Flux Linkages Per Ampere - Question 10

If the current changes from 20A to 10A in 5 seconds and the value of inductance is 1H, calculate the emf induced.

Detailed Solution for Test: Inductance in Terms of Flux Linkages Per Ampere - Question 10

We know that:
emf=L(i2-i1)/t
Substituting the values from the question we get emf=2V.

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