Have a query? Ask a Tutor!!

Access to best educators and exclusive paper discussions

Offsite Campus Turito Championship

Can’t find what you’re looking for?

Our tutors are from top schools around the world, and they are waiting for you 24/7, anytime, anywhere.

Homework- One to One Solutions
Understand concepts to solve better
Get your doubts solved instantly

Physics-

General

Easy

Question

The current through a coil of self inductance $L equals 2 blank m H$ is given by $I equals t to the power of 2 end exponent e to the power of negative t end exponent$ at time. $t$ . How long it will take to make the e.m.f. zero

1 s
2 s
3 s
4 s

The correct answer is: 2 s

$I equals t to the power of 2 end exponent e to the power of negative t end exponent rightwards double arrow fraction numerator d I over denominator d t end fraction equals 2 t e to the power of negative t end exponent minus t to the power of 2 end exponent e to the power of negative t end exponent equals t e to the power of negative t end exponent left parenthesis 2 minus t right parenthesis$
The induced emf is $epsilon equals negative L fraction numerator d I over denominator d t end fraction$
According to given problem, $epsilon equals 0 rightwards double arrow fraction numerator d I over denominator d t end fraction equals 0$ [Since $L not equal to 0$ ]
Or $e to the power of negative t end exponent t open parentheses 2 minus t close parentheses equals 0$ either $t equals 0$ or $t equals 2 blank s$
$t equals 2 s$ matches with the option [b]

Related Questions to study

When a low flying aircraft passes over head, we sometimes notice a slight shaking of the picture on our TV screen. This is due to

When a low flying aircraft passes over head, we sometimes notice a slight shaking of the picture on our TV screen. This is due to

Physics-General

A 220-volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

A 220-volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

Physics-General

The flux associated with coil changes from 1.35 Wb to 0.79 Wb within $fraction numerator 1 over denominator 10 end fraction$ s. Then the charge produced by the earth coil, if resistance of coil is 7 $capital omega$ is

The flux associated with coil changes from 1.35 Wb to 0.79 Wb within $fraction numerator 1 over denominator 10 end fraction$ s. Then the charge produced by the earth coil, if resistance of coil is 7 $capital omega$ is

Physics-General

parallel

A movable wire is moved to the right crossing an anti-clock-wise induced current, figure. The direction of magnetic induction in the region P points

A movable wire is moved to the right crossing an anti-clock-wise induced current, figure. The direction of magnetic induction in the region P points

Physics-General

The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If $240 blank v o l t blank A C$ is applied to the primary, the output from the secondary will be

The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If $240 blank v o l t blank A C$ is applied to the primary, the output from the secondary will be

Physics-General

If the curves $x to the power of 2 end exponent equals 9 A left parenthesis 9 minus y right parenthesis$ and $x to the power of 2 end exponent equals A left parenthesis y plus 1 right parenthesis$ intersect orthogonally, then the value of $A$ is

If the curves $x to the power of 2 end exponent equals 9 A left parenthesis 9 minus y right parenthesis$ and $x to the power of 2 end exponent equals A left parenthesis y plus 1 right parenthesis$ intersect orthogonally, then the value of $A$ is

parallel

The value of $c$ in Lagrange’s mean value theorem for the function $f open parentheses x close parentheses equals x left parenthesis x minus 2 right parenthesis$ when $x element of open square brackets 12 close square brackets comma$ is

The value of $c$ in Lagrange’s mean value theorem for the function $f open parentheses x close parentheses equals x left parenthesis x minus 2 right parenthesis$ when $x element of open square brackets 12 close square brackets comma$ is

A sphere of radius 100 mm shrinks to radius 98 mm, then the approximate decrease in its volume is

A sphere of radius 100 mm shrinks to radius 98 mm, then the approximate decrease in its volume is

The set of all values of $a$ for which the function
$f open parentheses x close parentheses equals open parentheses fraction numerator square root of a plus 4 end root over denominator 1 minus a end fraction minus 1 close parentheses x to the power of 5 end exponent minus 3 blank x plus log invisible function application 5$

Decreases for all real $x$ is

The set of all values of $a$ for which the function
$f open parentheses x close parentheses equals open parentheses fraction numerator square root of a plus 4 end root over denominator 1 minus a end fraction minus 1 close parentheses x to the power of 5 end exponent minus 3 blank x plus log invisible function application 5$

Decreases for all real $x$ is

parallel

Let $f open parentheses x close parentheses equals x to the power of 3 end exponent minus 6 x to the power of 2 end exponent plus 12 x minus 3$ . Then at $x equals 2 comma blank f left parenthesis x right parenthesis$ has

Let $f open parentheses x close parentheses equals x to the power of 3 end exponent minus 6 x to the power of 2 end exponent plus 12 x minus 3$ . Then at $x equals 2 comma blank f left parenthesis x right parenthesis$ has

If a particle moving along a line follows the law $t equals a s to the power of 2 end exponent plus b s plus c$ , then the retardation of the particle is proportional to

If a particle moving along a line follows the law $t equals a s to the power of 2 end exponent plus b s plus c$ , then the retardation of the particle is proportional to

A particle moves along a straight line with the law of motion given by $s to the power of 2 end exponent equals a t to the power of 2 end exponent plus 2 b t plus c.$ then the acceleration varies are

A particle moves along a straight line with the law of motion given by $s to the power of 2 end exponent equals a t to the power of 2 end exponent plus 2 b t plus c.$ then the acceleration varies are

parallel

The equation of the tangents at the origin to the curve $y to the power of 2 end exponent equals x to the power of 2 end exponent left parenthesis 1 plus x right parenthesis$ are

The equation of the tangents at the origin to the curve $y to the power of 2 end exponent equals x to the power of 2 end exponent left parenthesis 1 plus x right parenthesis$ are

A man $2 blank m e t r e s$ tall walks away from a lamp post $5 blank m e t r e s$ height at the rate of 4.8 km/hr. The rate of increase of the length of his shadow is

A man $2 blank m e t r e s$ tall walks away from a lamp post $5 blank m e t r e s$ height at the rate of 4.8 km/hr. The rate of increase of the length of his shadow is

A spherical balloon is being inflated at the rate of 30 $c c to the power of blank divided by m i n$ . The rate of increase of the surface area of the balloon when its diameter is 14cm, is

A spherical balloon is being inflated at the rate of 30 $c c to the power of blank divided by m i n$ . The rate of increase of the surface area of the balloon when its diameter is 14cm, is

parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.