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Three light rays, red (R) green (G) and blue (B) are incident on a right angled prism AB C at face AB. The , refractive indices of the material of the prism for red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. Out of the three, which colour of ray will emerge out of face AC? Justify your answer. Trace the path of these rays after passing through face

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the effect on the interference fringes in a Young’s double-slit experiment due to: the (monochromatic) source is replaced by another (monochromatic) source of shorter

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Assume that light of wavelength 6000Å is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers can distinguish which of the sources B or D has been

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron, an α-particle, and a proton have the same kinetic energy. Which of these particles has the shortest de Broglie

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Find charge on each spherical shell after joining the inner most shell and 1 outer most shell by a conducting wire. Also find charges on each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Three particles, each having a charge of 10µc are placed at the corners of an equilateral triangle of side 10 cm. The electrostatic potential energy of the system is (Given `1/(4piepsilon_o) = 9 × 10^9 N.m^2' /'c^2`)

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the time period for the following?

asked Mar 20, 2022 in 11th Physics by varun (6.7k points)

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An electric field is uniform, and in the positive x direction for positive x, and uniform with the same magnitude but in the negative x direction for negative x. It is given that E = 200 `hati` N/C for x > 0 and E = –200` hati` N/C for x < 0. A right circular cylinder of length 20 cm and radius 5 cm has its centre at the origin and its axis along the x-axis so that one face is at x = +10 cm and the other is at x = –10 cm (Fig. ).

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. If the charge on each is 6.5 × 10–7 C? The radii of A and B are negligible compared to the distance of separation. (a)What is the mutual force of electrostatic

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A magnetic field in a certain region is given by ` B = B_o cos (ωt)hat k` and a coil of radius a with resistance R is placed in the x-y plane with its centre at the origin in the magnetic field (see Fig ) . Find the magnitude and the direction of the current at (a, 0, 0) at t = π/2ω, t = π/ω and t =

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain why the reactance offered by an inductor increases with increasing frequency of an alternating

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by `45^0` . The value of c

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If Phase Difference between `E and I` is `pi/4 and f = 50 Hz` then calculate time

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When an alternating voltage of 220V is applied across a device X, a current of 0.5 A flows through thecircuit and is in phase with the applied voltage. When the same voltage is applied across another deviceY, the same current again flows through the circuit but it leads the applied voltage by `pi'/'2` radians.(a) Name the devices `X and Y.`(b) Calculate the current flowing in the circuit when same voltage is applied across the seriescombination of `X and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A choke coil of resistance R and inductance L is connected in series with a capacitor C and complete combination is connected to a.c. voltage, Circuit resonates when angular frequency of supply is `omega = omega_0`. (a) Find out relation betwen `omega_0, L and C` (b) What is phase difference between V and I at resonance, is it changes when resistance of choke coil is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the circuit (Fig. ) the current is to be measured. What is the value of the current if the ammeter shown(i) is a galvanometer with a resistance RG = 60.00 Ω;(ii) is a galvanometer described in (a) but converted to an ammeter by a shunt resistance r s = 0.02 Ω;(iii) is an ideal ammeter with zero

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns (at the point). Do the magnetic field lines also represent the lines of force on a moving charged particle at every

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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