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The work function of caesium metal is 2.14 eV. When light of frequency 6 ×1014Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic energy of the emitted electrons, (b) Stopping potential, and (c) maximum speed of the emitted photoelectrons?

The photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it. A... View Article

A five-digit number divisible by 3 is to be formed using the digits 0,1,2,3,4 and 5, without repetition. The total number of ways this can be done is

A five-digit number divisible by 3 is to be formed using the digits 0,1,2,3,4 and 5, without repetition. The total number of ways this can be... View Article

If two matrices have the same numbers in them, then they are equal. Say True or false

The answer is False Two matrices are called equal matrices if they have the same order or dimension and the corresponding elements are equal.... View Article

Show that area of the triangle formed by the lines y = m₁x, y = m₂x, and y = c is equal to c²/4(√33 + √11), where m₁, m₂ are the roots of the equation x² + (√3 + 2)x + √3 – 1 = 0.

Show that area of the triangle formed by the lines y = m1x, y = m2x, and y = c is equal to c2/4(√33 + √11), where m1, m2 are the... View Article

If the supplement of an angle is 4 times of its compliment, then the measure of the angle is _______________.

Let us assume the required angle to be x Then The supplement of it is 180−xThe complement of it is 90−x As per the... View Article

Find the smallest square number which is divisible by each of the numbers 6,9 and 15.

At first we have to find L.C.M of 6,9 and 15 6 = 2 x 3 x 1 9 = 3 x 3 x 1 15 = 3 x 5 x 1 Hence, L.C.M... View Article

Determine which of the following polynomials has (x + 1) a factor:
i) x³ + x² + x + 1 ii) x⁴ + x³ + x² + x + 1 iii) x4+ 3x³ + 3x² + x + 1 iv) x³ – x² – (2 + √2)x + √2

Polynomials are expressions which consist of unknown variables. Thus, we need to follow the steps to perform division on polynomials. First,... View Article

Equal current i flows in two segments of a circular loop of radius r in the direction shown in figure. The magnitude of magnetic field at the centre of the loop is

The magnetic field is an invisible space around a magnetic object. A magnetic field is basically used to describe the distribution of magnetic... View Article

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Archives

The work function of caesium metal is 2.14 eV. When light of frequency 6 ×1014Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic energy of the emitted electrons, (b) Stopping potential, and (c) maximum speed of the emitted photoelectrons?

A five-digit number divisible by 3 is to be formed using the digits 0,1,2,3,4 and 5, without repetition. The total number of ways this can be done is

If two matrices have the same numbers in them, then they are equal. Say True or false

Show that area of the triangle formed by the lines y = m₁x, y = m₂x, and y = c is equal to c²/4(√33 + √11), where m₁, m₂ are the roots of the equation x² + (√3 + 2)x + √3 – 1 = 0.

If the supplement of an angle is 4 times of its compliment, then the measure of the angle is _______________.

Find the smallest square number which is divisible by each of the numbers 6,9 and 15.

Determine which of the following polynomials has (x + 1) a factor:
i) x³ + x² + x + 1 ii) x⁴ + x³ + x² + x + 1 iii) x4+ 3x³ + 3x² + x + 1 iv) x³ – x² – (2 + √2)x + √2

An equilateral triangle of side 9 cm is inscribed in circle then the radius of the circle is

Obtain the values of sin, cos and tan in tabular form

Write the equivalent fractions of 42/56.

The line y=mx+1 is a tangent to the curve y²=4x if the value of m is ___________

How to add binary ones at once?

Four fifth of a number is more than three fourth of the number by 4. Find the number.

Sides of two similar triangles are in the ratio 4 9. What will be the ratio of area of these triangles?

A coin is tossed 3 times what is the probability of getting at least two tails

If a system of equations in two variables has a unique solution, then the lines on the graph are_________

Find the measure of each exterior angle of a regular pentagon, hexagon, heptagon, polygon of 15 sides.

Five boys and three girls are seated at random in a row. Find the probability that no boy sits between two girls.

When light travels from a rarer to a denser medium, the speed of light in the medium _______

Equal current i flows in two segments of a circular loop of radius r in the direction shown in figure. The magnitude of magnetic field at the centre of the loop is

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