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0:03:27

Calculate the orbital period of the electron in the first excited state of hydrogen atom.....

0:05:42

(a) Identify the part of the electromagnetic spectrum used in (i) radar and (ii) eye surgery. Wr....

0:01:13

If A is a square matrix of order 3 with |A| = 4, then write the value of |– 2A|.....

0:02:31

A convex lens made of glass of refractive index \\(n_1\\) is dipped in a liquid of refractive in....

0:02:45

Integrate the function cos(x+a)sin(x+b) w.r.t. x.....

0:03:36

If x = sin t, y = sin pt,, prove that 1-x2d2ydx2-xdydx+p2y=0.....

0:03:30

A long straight wire AB carries a current of 4 A. A proton P travels at 4 × 106 ms–1....

0:03:32

Two large parallel plane sheets have uniform charge densities +σ and -σ. Determine t....

0:01:34

If \\(*\\) is defined on the set \\(\\mathbb{R}\\) of all real numbers by \\(*: \\mathrm{a} * \\....

0:02:00

Write the order and the degree of the differential equationd4ydx42=x+dydx23....

0:03:43

Prove that:cos-11213+sin-135=sin-15665....

0:03:14

If a line has the direction ratios – 18, 12, – 4, then what are its direction cosine....

0:05:16

A proton, a deuteron and an alpha particle, are accelerated through the same potential differenc....

0:04:06

(a) Briefly explain how a galvanometer is converted into a voltmeter.(b) A voltmeter of a certai....

0:02:03

A beam of light converges at a point P. Now a convex lens is placed in the path of the convergen....

0:03:51

When a radiation of wavelength \\(\\lambda\\) falls on a photosensitive surface, the maximum kin....

0:04:04

Find the value of x, for which the four points A(x, –1, –1), B(4, 5, 1), C(3, 9, 4) ....

0:03:33

(a) For the circuit shown in the figure, how would the balancing length be affected, if(i) R1 is....

0:02:52

An object is kept in front of a concave mirror of focal length 15 cm. The image formed is real a....

0:02:26

 A wire of resistance \\(\\mathrm{R}\\) is stretched \\(\\mathrm{n}\\) times its original l....

0:02:09

Find the cartesian equation of the line which passes through the point (– 2, 4, – 5)....

0:05:10

The flow of current for forward biasing in a silicon p-n junction diode is due to\n\n\n....

0:06:01

Prove that ∫0af(x)dx=∫0af(a-x)dx, and hence evaluate ∫01x2(1-x)ndx.....

0:02:25

A certain n-p-n transistor has the common emitter output characteristics as shown in the figure.....