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General

General

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Question

A ray of light is incident along vector $fraction numerator 1 over denominator square root of 2 end fraction i with not stretchy hat on top minus fraction numerator 1 over denominator square root of 2 end fraction j with not stretchy hat on top plus k with not stretchy hat on top$ on plane mirror placed in XY-plane normal on incidence point is along Z-axis

on plane mirror placed in XY-plane normal on incidence point is along Z-axis
The angle of incidence is $30^{o}$
The angle of incidence is $45^{o}$
Both (a) and (c) correct

The correct answer is: Both (a) and (c) correct

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$text If end text a equals 3 i with not stretchy hat on top plus 4 j with not stretchy hat on top text and end text b equals 4 i with not stretchy hat on top minus 3 j with not stretchy hat on top comma text then end text$

$text If end text a equals 3 i with not stretchy hat on top plus 4 j with not stretchy hat on top text and end text b equals 4 i with not stretchy hat on top minus 3 j with not stretchy hat on top comma text then end text$

If unit vector $a equals a subscript 1 i with not stretchy hat on top plus a subscript 2 j with not stretchy hat on top plus a subscript 3 k with not stretchy hat on top$ . The possible values of a₁ a₂ and a₃ are

If unit vector $a equals a subscript 1 i with not stretchy hat on top plus a subscript 2 j with not stretchy hat on top plus a subscript 3 k with not stretchy hat on top$ . The possible values of a₁ a₂ and a₃ are

Current from $A blank a n d blank B$ in the straight wire is decreasing. The direction of induced current in the loop, is

Current from $A blank a n d blank B$ in the straight wire is decreasing. The direction of induced current in the loop, is
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According to Lenz’s law of electromagnetic induction

According to Lenz’s law of electromagnetic induction

Physics-General

Two circular coils $A$ and $B$ are facing each other as shown in figure. When the current $i$ through $A$ is altered

Two circular coils $A$ and $B$ are facing each other as shown in figure. When the current $i$ through $A$ is altered
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A circular loop of radius $R$ , carrying current $I$ lies in $x y minus$ plane with its centre at origin. The total magnetic flux through $x y$ -plane is

A circular loop of radius $R$ , carrying current $I$ lies in $x y minus$ plane with its centre at origin. The total magnetic flux through $x y$ -plane is

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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

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

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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

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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

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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

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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

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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

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

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