The magnetic flux across a loop of resistance `10Omega` is given by `phi=5t^(2)-4t^(2)+1Wb`. How much current is induced in the loop after `0.2` s?

Question

The magnetic flux across a loop of resistance `10Omega` is given by `phi=5t^(2)-4t^(2)+1Wb`. How much current is induced in the loop after `0.2` s?

The magnetic flux across a loop of resistance `10Omega` is given by `phi=5t^(2)-4t^(2)+1Wb`. How much current is induced in the loop after `0.2` s?
A. 0.4 A
B. 0.2 A
C. 0.04 A
D. 0.02 A

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

A coil of 100 turns and of diameter 0.2 m is placed at right angles to a uniform magnetic field. If the field increases uniformly from 0.1Wb . `m^(-2)

2 Answers 8 Views

Magnetic flux through a stationary loop with a resistance R varies during the time interval `tau" as "phi=alphat(tau-t)` where `alpha` is a constant.

2 Answers 8 Views

The magnetic flux through a coil is varying according to the relation `phi=(4t^(2)+2t-5)Wb`, t measured in seconds. Calculate the induced current thro

2 Answers 6 Views

The magnetic flux linked with a coil, in webers is given by the equation `phi=3t^(2)+4t+9`. Then, the magnitude of induced emf at t = 2 s

2 Answers 4 Views

Assertion Magnetic flux and the electric flux have the same units. Reason Flux passing throught a surface gives an idea about the field lines crossing

2 Answers 7 Views

Assertion An induced emf of 2 V is developed in a circular loop, if current in the loop is changed at a rate of 4 `As^(-1)` .IF 4 A of current is pass

2 Answers 5 Views

Assertion If current passing through a circular loop is doubled, then magnetic flux linked with the circular loop will also become two times. Reason N

2 Answers 9 Views

The order of reactivity of : `phi-CH_(3)` (I), `phi-CH_(2)-CH_(3)` (II), and `phi-C(CH_(3))_(3)` (IV) Where `phi=C_(6)H_(5)`

2 Answers 4 Views

The flux of magnetic field through a closed conducting loop of resistance `0.4 Omega` changes with time according to the equation `Phi =0.20 t^(2)+0.4

2 Answers 5 Views

If `theta-phi=pi/2,` prove that, `[(cos^2 theta,cos theta sin theta),(cos theta sin theta,sin^2 theta)] [(cos^2 phi,cos phi sin phi),(cos phi sin phi,

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - c
Magnetic flux, `phi=(5t^(2)-4t+1)Wb`
`therefore" "(dphi)/(dt)=10t-4"Wbs"^(-1)`
The induced emf, `e=(-dphi)/(dt)=-(10t-4)`
At, t = 0.2 s, `e=-(10xx0.2-4)=2V`
The induced current, `I=(e)/(R)=(2V)/(10Omega)=0.2A`

5 views Answered 2023-02-05 15:29