At separation between a node and antinode, wavelength becomes

A. λ

B. λ⁄2

C. λ⁄4

D. 2λ

1 Answer

Answer :

λ⁄4


Related questions

Description : When a light wave suffers reflection at the interface between air and glass medium, the change of wavelength of the reflected wave in air is equal to (a) 0 (b) λ/2 (c) λ (d) 2λ

Last Answer : (b) λ/2

Description : A wave and its reflection produce a standing wave with the distance from NODE to nearest ANTINODE of 4 meters. The wavelength of this wave is: w) 4 meters x) 8 meters y) 12 meters z) 16 meters

Last Answer : ANSWER: Z -- 16 METERS

Description : A standing wave is formed on a tightly stretched string. The distance between a node and an antinode is: w) 1/8 wavelength x) 1/4 wavelength y) 1/2 wavelength z) 1 wavelength

Last Answer : ANSWER: X -- 1/4 WAVELENGTH

Description : The distance between node and adjacent antinode is 30 cm. The wavelength is (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Last Answer : 60 cm.

Description : The path difference corresponding to a phase difference of π radian is __________. A.2λ B .λ/2 C .λ /4 D. λ

Last Answer : B .λ/2

Description : Phase difference between a node and an antinode is A. 90° B. 45° C. 180° D. 360°

Last Answer : 180°

Description : What is wavelength (λ)?

Last Answer : The space occupied by one cycle of a radio wave at any given instant.

Description : The region where the Lyman series contains the wavelength 1∕ λ = RH [1/ 12 – 1/ n2 ] is a) visible region b) infrared region c) ultraviolet region d ) none of these

Last Answer : c) ultraviolet region

Description : To observe interference in thin films with a light of wavelength λ, the thickness of the film (a) Should be much smaller than λ (b) Should be a few thousand times of λ (c) Should be of the order of λ (d) Should be of the order of nanometer

Last Answer : (c) Should be of the order of λ

Description : The distance between node and adjacent antinodes is 30 cm. The wavelength is - (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Last Answer : (4) 60 cm. Explanation: A node is a point along a standing wave where the wave has minimal amplitude. The opposite of a node is an anti-node, a point where the amplitude of the standing wave is a maximum.

Description : The typical length of the rhombic antenna is ____. A. 2λ to 8λ B. 10λ to 20λ C. 1λ to 3λ D. 5λ to 10λ

Last Answer : A. 2λ to 8λ

Description : For Hydrogen atom, the allowed stationary orbits are those whose orbital angular momentum is equal to an integral multiple of h i.e., mvr = a) nh/2π b) nh x 2π c) nh / 2λ d) nh / 2πλ

Last Answer : a) nh/2π

Description : As the reflux ratio decreases, the (A) Separation becomes more efficient (B) Number of plates increases (C) Column diameter increases (D) None of these

Last Answer : (B) Number of plates increases

Description : What happens to the fundamental mode as the operating wavelength becomes longer than the single mode cutoff wavelength?

Last Answer : The fundamental mode becomes increasingly lossy.

Description : The line through the points (4, 3) and (2, 5) cuts off intercepts of lengths λ and μ on the axes. Which one of the following is correct ? -Maths 9th

Last Answer : (c) a, b, c are in H.P. only for all m As the points A(a, ma), B[b, (m + 1)b] and C[c, (m + 2)c] are collinear. Area of Δ ABC should be equal to zero.⇒ \(rac{1}{2}\)[x1(y2 - y3) + x2(y3 - y1) + ... - bc = 0 ⇒ ab + bc = 2ac ⇒ b = \(rac{2ac}{a+c}\)∴ a, b, c are harmonic progression (H.P.) for all m.

Description : An immunoglobulin molecule always contains (A) 1 κ and 3 λ type of chains (B) 2 κ and 2 λ type of chains (C) 3 κ and 1λ type of chains (D) 2 κ and 2 λ chains

Last Answer : Answer : D

Description : What is the gain, in dB of a helical antenna with diameter of λ/3, 10 turns at pitch of λ/4, used at 100 MHz? A. 16 B. 41.1 C. 31.4 D. 1.25

Last Answer : A. 16

Description : What type of balun (balanced-to-unbalanced) is used in high frequency applications? A. Transformer type balun B. A specially configured coaxial transmission line C. A specially configured parallel-wire line D. A λ/2 transformer balun

Last Answer : B. A specially configured coaxial transmission line

Description : A pair of current-carrying conductors is not considered a transmission line unless it is at least ___ λ long at the signal frequency. A. 0.1 B. 0.3 C. 0.2 D. 0.4

Last Answer : A. 0.1

Description : Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes? (a) Retrovirus (b) Ti plasmid (c) λ phage (d) pBR322

Last Answer : (a) Retrovirus

Description : Electric field of an infinitely long conductor of charge density λ, is given by E = λ/(2πεh).aN. State True/False. a) True b) False

Last Answer : a) True

Description : The potential of a uniformly charged line with density λ is given by, λ/(2πε) ln(b/a). State True/False. a) True b) False

Last Answer : a) True

Description : The condition of diffraction from a crystal is given by (A) nλ = 2d Sin θ (B) λ = d Sin 2θ (C) λ = 2d Sin 2θ (D) nλ = d Sin θ

Last Answer : (A) nλ = 2d Sin θ

Description : The interference in thin films is because (a) The film reflects some light (b) The film is thin enough so that refracted ray is close to reflected ray (c) The reflected ray undergo path change of λ/2 (d) All of above

Last Answer : (d) All of above

Description : Resolving power of grating is given by A. λ/2 B. λ/dλ C. dλ/λ D. none of these

Last Answer : B. λ/dλ

Description : .In Rayleigh law of scattering ,The intensity of scattered light is proportional to A. λ B. λ -2 C. λ -4 D. λ-1

Last Answer : C. λ -4

Description : The fringe width and the angle of wedge are related to A. β=λ/2θ B. θ =λ/2 β C. β=λ/θ D. λ= β/2θ

Last Answer : A. β=λ/2θ

Description : Traffic intensity is computed by using the formula: a. λ/μ b. μ/λ c. 1- λ/μ d. 1- μ/λ

Last Answer : a. λ/μ

Description : In queuing theory, ............................ stands for mean service rate. a. μ b. λ c. t d. none of these

Last Answer : a. μ

Description : In queuing theory, ............................ stands for mean arrival rate of customers. a. μ b. λ c. t d. none of these

Last Answer : b. λ

Description : A fuzzy set A on R is ................. iff A(λx1 + (1 – λ)x2) ≥ min [A(x1), A(x2)] for all x1, x2 ∈ R and all λ ∈ [0, 1], where min denotes the minimum operator. (A) Support (B) α-cut (C) Convex (D) Concave 

Last Answer : (C) Convex 

Description : A pushdown automation M = (Q, Σ, Γ, δ, q0, z, F) is set to be deterministic subject to which of the following condition(s), for every q ∈ Q, a ∈ Σ ∪ {λ} and b ∈ Γ (s1) δ(q, a, b) contains at most one ... ) must be empty for every c ∈ Σ (A) only s1 (B) only s2 (C) both s1 and s2 (D) neither s1 nor s2

Last Answer : (C) both s1 and s2

Description : The grammar with production rules S → aSb |SS|λ generates language L given by: (A) L = {w∈{a, b}* | na(w) = nb(w) and na(v) ≥ nb(v) where v is any prefix of w} (B) L = {w∈{a, b}* | na(w) = nb(w) and na(v ... (D) L = {w∈{a, b}* | na(w) ≠ nb(w) and na(v) ≤ nb(v) where v is any prefix of w}

Last Answer : (A) L = {w∈{a, b}* | na(w) = nb(w) and na(v) ≥ nb(v) where v is any prefix of w} 

Description : The equivalent production rules corresponding to the production rules S→Sα1|Sα2|β1|β2 is (A) S→β1 | β2, A→α1A | α2A | λ (B) S→β1 | β2 | β1A | β2A,  A→α1A | α2A (C) S→β1 | β2, A→α1A | α2A (D) S→β1 | β2 | β1A | β2A,  A→α1A | α2A | λ

Last Answer : (D) S→β1 | β2 | β1A | β2A,  A→α1A | α2A | λ

Description : Given the production rules of a grammar G1 as S1→AB | aaB A→a | Aa B→b and the production rules of a grammar G2 as S2→aS2bS2 | bS2aS2 | λ Which of the following is correct statement? ( ... G1 is not ambiguous and G2 is ambiguous. (D) G1 is not ambiguous and G2 is not ambiguous.

Last Answer : (B) G1 is ambiguous and G2 is ambiguous.

Description : The Greibach normal form grammar for the language L={an bn+1|n≥0} is (A) S→a SB, B→bB|λ (B) S→a SB, B→bB|b (C) S→a SB|b, B→b (D) S→a Sb|b

Last Answer : (C) S→a SB|b, B→b 

Description : Given the following statements: S1 : The grammars S→asb | bsa | ss | a and S→asb | bsa | a are not equivalent. S2: The grammars S→ss | sss | asb | bsa | λ and S→ss | asb | bsa | λ are equivalent. ... and S2 are correct (C) S1 is not correct and S2 is correct (D) Both S1 and S2 are not correct.

Last Answer : (A) S1 is correct and S2 is not correct.

Description : The context free grammar for the language L = {an bm | n≤m+3, n≥0, m≥0} is (A) S→aaaA; A→aAb|B, B→Bb|λ (B) S→aaaA|λ, A→aAb|B, B→Bb|λ (C) S→aaaA|aaA|λ, A→aAb|B, B→Bb|λ (D) S→aaaA|aaA|aA|λ, A→aAb|B, B→Bb|λ

Last Answer : (D) S→aaaA|aaA|aA|λ, A→aAb|B, B→Bb|λ

Description : The regular expression for the complement of the language L = {anbm|n≥4, m≤3} is: (A) (λ + a + aa + aaa)b* + a*bbbb* + (a + b)*ba(a + b)* (B) (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)*ab(a + b)* (C) (λ + a ... *bbbbb* + (a + b)*ab(a + b)* (D) (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)*ba(a + b)*

Last Answer : (D) (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)*ba(a + b)*

Description : The phase angle corresponding to λ/4 in a standing– wave pattern is: (1) 30° (2) 90° (3) 135° (4) 180°

Last Answer : The phase angle corresponding to λ/4 in a standing– wave pattern is: 90°

Description : A node having twice the frequency of the fundamental is called A. half harmonic B. harmonic C. double harmonic D. triple harmonic

Last Answer : harmonic

Description : What is the amplitude of a standing wave at its node?

Last Answer : ANSWER: 0

Description : In a perfectly elastic collision, the relative speed of approach and relative speed of separation are A. equal B. in equal C. zero D. infinite

Last Answer : equal

Description : In an elastic collision, the RELATIVE velocities of separation of the two bodies after impact compared with the relative velocity of approach before impact is: w) always greater x) always smaller y) always the same z) first greater, then smaller

Last Answer : ANSWER: Y -- ALWAYS THE SAME

Description : The splitting of an atomic nucleus is called: w) fission x) fusion y) cleavage z) separation

Last Answer : ANSWER: W -- FISSION

Description : For a parallel-plate capacitor with plate area "A" and plate separation "d", the capacitance is proportional to which of the following? w) A divided by d squared x) A times d y) A divided by d z) d divided by A

Last Answer : ANSWER: Y -- A DIVIDED BY D

Description : Five volts are applied across the plates of a parallel plate capacitor. The distance of separation of the plates is .02 meters. What is the magnitude of the electric field inside the capacitor?

Last Answer : ANSWER: 250 VOLTS PER METER or 250 NEWTONS PER COULOMB

Description : What is the unit of wavelength ?

Last Answer : unit of wavelength m