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Physics-

General

Easy

Question

A me tall ic rod e cm long, A squar e cm h cross-section is heated through t" C. If Young's modulus of elasticity of the metal is E and the mean c oeffic ient of linear expansion is a per degree celsius, then the compressional force required to prevent the rod from expanding along it s length is

$E A α t$
$E A α t / (1 + α t)$
$E A α t / (1 - α t)$
$E l α t$

The correct answer is: $E A alpha t$

Related Questions to study

The cylindrical tube of as pray pump has radius, R, o neend of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the hole sis :

The cylindrical tube of as pray pump has radius, R, o neend of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the hole sis :

Physics-General

A vessel with water is place don a weighing pan and it reads 600g.Now a ball ofmass40ganddensity0.80gcm-3issunkintothewater with a p in of negligible volume, as shown in figure keeping it sunk. The weight in g pan will show are a ding

A vessel with water is place don a weighing pan and it reads 600g.Now a ball ofmass40ganddensity0.80gcm-3issunkintothewater with a p in of negligible volume, as shown in figure keeping it sunk. The weight in g pan will show are a ding

Physics-General

$4 s i n space 27 to the power of 0 equals$

$4 s i n space 27 to the power of 0 equals$

parallel

if $A equals 340 to the power of ring operator$ then $square root of 1 minus sin space A end root minus square root of 1 plus sin space A end root equals$

if $A equals 340 to the power of ring operator$ then $square root of 1 minus sin space A end root minus square root of 1 plus sin space A end root equals$

$2 sin space A over 2 equals square root of 1 plus sin space A end root minus square root of 1 minus sin space A end root text then end text$

$2 sin space A over 2 equals square root of 1 plus sin space A end root minus square root of 1 minus sin space A end root text then end text$

$I f space 2 cos space A divided by 2 equals √ left parenthesis 1 plus sin space A right parenthesis plus √ left parenthesis 1 minus sin space A right parenthesis comma space t h e n space A divided by 2 space l i e s space b e t w e e n$

$I f space 2 cos space A divided by 2 equals √ left parenthesis 1 plus sin space A right parenthesis plus √ left parenthesis 1 minus sin space A right parenthesis comma space t h e n space A divided by 2 space l i e s space b e t w e e n$

parallel

$I f space 2 sin space A divided by 2 equals √ left parenthesis 1 plus sin space A right parenthesis plus √ left parenthesis 1 minus sin space A right parenthesis comma space t h e n space A divided by 2 space l i e s space b e t w e e n$

$I f space 2 sin space A divided by 2 equals √ left parenthesis 1 plus sin space A right parenthesis plus √ left parenthesis 1 minus sin space A right parenthesis comma space t h e n space A divided by 2 space l i e s space b e t w e e n$

If $2 cos space A over 2 equals square root of 1 plus sin space A end root minus square root of 1 minus sin space A end root$ , then

If $2 cos space A over 2 equals square root of 1 plus sin space A end root minus square root of 1 minus sin space A end root$ , then

Let $omega$ = – $fraction numerator 1 over denominator 2 end fraction plus i fraction numerator square root of 3 over denominator 2 end fraction$ . Then the value of the determinant $open vertical bar table row 1 1 1 row 1 cell negative 1 minus omega to the power of 2 end exponent end cell cell omega to the power of 2 end exponent end cell row 1 cell omega to the power of 2 end exponent end cell cell omega to the power of 4 end exponent end cell end table close vertical bar$ is

Let $omega$ = – $fraction numerator 1 over denominator 2 end fraction plus i fraction numerator square root of 3 over denominator 2 end fraction$ . Then the value of the determinant $open vertical bar table row 1 1 1 row 1 cell negative 1 minus omega to the power of 2 end exponent end cell cell omega to the power of 2 end exponent end cell row 1 cell omega to the power of 2 end exponent end cell cell omega to the power of 4 end exponent end cell end table close vertical bar$ is

parallel

If $omega$ ( $not equal to$ 1) is a cube root of unity, then $open vertical bar table row 1 cell 1 plus i plus omega to the power of 2 end exponent end cell cell omega to the power of 2 end exponent end cell row cell 1 minus i end cell cell negative 1 end cell cell omega to the power of 2 end exponent minus 1 end cell row cell negative i end cell cell negative i plus omega minus 1 end cell cell negative 1 end cell end table close vertical bar$ equals

If $omega$ ( $not equal to$ 1) is a cube root of unity, then $open vertical bar table row 1 cell 1 plus i plus omega to the power of 2 end exponent end cell cell omega to the power of 2 end exponent end cell row cell 1 minus i end cell cell negative 1 end cell cell omega to the power of 2 end exponent minus 1 end cell row cell negative i end cell cell negative i plus omega minus 1 end cell cell negative 1 end cell end table close vertical bar$ equals

Find the value of ‘a’ if the three equations, (a + 1)³x + (a + 2)³y = (a + 3)³, (a + 1) x + (a + 2)y = (a + 3) & x + y = 1 are consistent.

Find the value of ‘a’ if the three equations, (a + 1)³x + (a + 2)³y = (a + 3)³, (a + 1) x + (a + 2)y = (a + 3) & x + y = 1 are consistent.

The condition for the expression ax² + 2hxy + by² + 2gx + 2fy + c to be resolved into rational linear factors in the determinant form is -

The condition for the expression ax² + 2hxy + by² + 2gx + 2fy + c to be resolved into rational linear factors in the determinant form is -

parallel

If $open vertical bar table row cell 1 plus x end cell x cell x to the power of 2 end exponent end cell row x cell 1 plus x end cell cell x to the power of 2 end exponent end cell row cell x to the power of 2 end exponent end cell x cell 1 plus x end cell end table close vertical bar$ = ax⁵ + bx⁴ + cx³ + dx² + $lambda$ x + $mu$ be an identity in x, where a, b, c, d, $lambda$ , $mu$ are independent of x. Then the value of $lambda$ is

If $open vertical bar table row cell 1 plus x end cell x cell x to the power of 2 end exponent end cell row x cell 1 plus x end cell cell x to the power of 2 end exponent end cell row cell x to the power of 2 end exponent end cell x cell 1 plus x end cell end table close vertical bar$ = ax⁵ + bx⁴ + cx³ + dx² + $lambda$ x + $mu$ be an identity in x, where a, b, c, d, $lambda$ , $mu$ are independent of x. Then the value of $lambda$ is

If the following equations x + y – 3 = 0(1 + $lambda$ ) x + (2 + $lambda$ ) y – 8 = 0x – (1 + $lambda$ ) y + (2 + $lambda$ ) = 0 are consistent then the value of $lambda$ is

If the following equations x + y – 3 = 0(1 + $lambda$ ) x + (2 + $lambda$ ) y – 8 = 0x – (1 + $lambda$ ) y + (2 + $lambda$ ) = 0 are consistent then the value of $lambda$ is

If $alpha comma beta comma gamma$ are the roots of x³ – 3x + 2 = 0, then the value of the determinant $open vertical bar table row alpha beta gamma row beta gamma alpha row gamma alpha beta end table close vertical bar$ is equal to

If $alpha comma beta comma gamma$ are the roots of x³ – 3x + 2 = 0, then the value of the determinant $open vertical bar table row alpha beta gamma row beta gamma alpha row gamma alpha beta end table close vertical bar$ is equal to

parallel

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