The vector of leaf curl virus

Description : The leaf curl disease in Chilli, Tobacco, Papaya and Tomato is a - a) Difeciency of Zinc b) Virus borne disease c) Difeciency of Phosphoras d) Difeciency of Iron

Last Answer : b) Virus borne disease

The relation between flux density and vector potential is a) B = Curl(A) b) A = Curl(B) c) B = Div(A) d) A = Div(B)

Description : The relation between flux density and vector potential is a) B = Curl(A) b) A = Curl(B) c) B = Div(A) d) A = Div(B)

Last Answer : a) B = Curl(A)

Find the curl of the vector A = yz i + 4xy j + y k a) xi + j + (4y – z)k b) xi + yj + (z – 4y)k c) i + j + (4y – z)k d) i + yj + (4y – z)k

Description : Find the curl of the vector A = yz i + 4xy j + y k a) xi + j + (4y – z)k b) xi + yj + (z – 4y)k c) i + j + (4y – z)k d) i + yj + (4y – z)k

Last Answer : d) i + yj + (4y – z)k

Find the curl of the vector and state its nature at (1,1,-0.2) F = 30 i + 2xy j + 5xz 2 k a) √4.01 b) √4.02 c) √4.03 d) √4.04

Description : Find the curl of the vector and state its nature at (1,1,-0.2) F = 30 i + 2xy j + 5xz 2 k a) √4.01 b) √4.02 c) √4.03 d) √4.04

Last Answer : d) √4.04

The curl of a curl of a vector gives a a) Scalar b) Vector c) Zero value d) Non zero value

Description : The curl of a curl of a vector gives a a) Scalar b) Vector c) Zero value d) Non zero value

Last Answer : b) Vector

The curl of curl of a vector is given by, a) Div(Grad V) – (Del) 2 V b) Grad(Div V) – (Del) 2 V c) (Del) 2 V – Div(Grad V) d) (Del) 2 V – Grad(Div V)

Description : The curl of curl of a vector is given by, a) Div(Grad V) – (Del) 2 V b) Grad(Div V) – (Del) 2 V c) (Del) 2 V – Div(Grad V) d) (Del) 2 V – Grad(Div V)

Last Answer : b) Grad(Div V) – (Del) 2 V

Curl is defined as the angular velocity at every point of the vector field. State True/False. a) True b) False

Description : Curl is defined as the angular velocity at every point of the vector field. State True/False. a) True b) False

Last Answer : a) True

Curl of gradient of a vector is a) Unity b) Zero c) Null vector d) Depends on the constants of the vector

Description : Curl of gradient of a vector is a) Unity b) Zero c) Null vector d) Depends on the constants of the vector

Last Answer : c) Null vector

Divergence of gradient of a vector function is equivalent to a) Laplacian operation b) Curl operation c) Double gradient operation d) Null vector

Description : Divergence of gradient of a vector function is equivalent to a) Laplacian operation b) Curl operation c) Double gradient operation d) Null vector

Last Answer : a) Laplacian operation

A vector is said to be solenoidal when its a) Divergence is zero b) Divergence is unity c) Curl is zero d) Curl is unity

Description : A vector is said to be solenoidal when its a) Divergence is zero b) Divergence is unity c) Curl is zero d) Curl is unity

Last Answer : a) Divergence is zero

Identify the correct vector identity. a) i . i = j . j = k . k = 0 b) i X j = j X k = k X i = 1 c) Div (u X v) = v . Curl(u) – u . Curl(v) d) i . j = j . k = k . i = 1

Description : Identify the correct vector identity. a) i . i = j . j = k . k = 0 b) i X j = j X k = k X i = 1 c) Div (u X v) = v . Curl(u) – u . Curl(v) d) i . j = j . k = k . i = 1

Last Answer : c) Div (u X v) = v . Curl(u) – u . Curl(v)

The curl of gradient of a vector is non-zero. State True or False. a) True b) False

Description : The curl of gradient of a vector is non-zero. State True or False. a) True b) False

Last Answer : b) False

The divergence of curl of a vector is zero. State True or False. a) True b) False

Description : The divergence of curl of a vector is zero. State True or False. a) True b) False

Last Answer : a) True

The relation between vector potential and field strength is given by a) Gradient b) Divergence c) Curl d) Del operator

Description : The relation between vector potential and field strength is given by a) Gradient b) Divergence c) Curl d) Del operator

Last Answer : a) Gradient

The del operator is called as a) Gradient b) Curl c) Divergence d) Vector differential operator

Description : The del operator is called as a) Gradient b) Curl c) Divergence d) Vector differential operator

Last Answer : d) Vector differential operator

Which of the following are not vector functions in Electromagnetic? a) Gradient b) Divergence c) Curl d) There is no non- vector functions in Electromagnetics

Description : Which of the following are not vector functions in Electromagnetic? a) Gradient b) Divergence c) Curl d) There is no non- vector functions in Electromagnetics

Last Answer : d) There is no non- vector functions in Electromagnetics

citrus leaf curl

Description : citrus leaf curl

Last Answer : Or water late at night..........don't wet the tree water only the ground..............at night mix up 2 tablespoons dawn & 1 qt water and spray on & under the leaves........... ... including the Arizona information site says.........using soapy water or store bought insecticidual soap.............

What causes Leaf curl in tomatoes.

Description : What causes Leaf curl in tomatoes.

Last Answer : Need Answer

my sibirica coral dogwood has leaf curl and small black insect infestation - what to do

Description : my sibirica coral dogwood has leaf curl and small black insect infestation - what to do

Last Answer : Need Answer

my peach trees have leaf curl. fruit has formed. what can i do

Description : my peach trees have leaf curl. fruit has formed. what can i do

Last Answer : It is a fungal infection. Can only treat in dormant condition.......fall & spring dormant oil or AG oil..................for trees.............read instructions carefully for application. Leaves will drop off but new ones will appear.

What to do with leaf curl on tomato plants

Description : What to do with leaf curl on tomato plants

Last Answer : Need Answer

what causes tomato leaf curl?

Description : what causes tomato leaf curl?

Last Answer : after the sun goes down, mix 1 tablespoon liquid soap & 1 qt water and spray...spray again when it rains.

how do you treat curl leaf on tomatoes?

Description : how do you treat curl leaf on tomatoes?

Last Answer : Need Answer

what causes plum tree leaf curl

Description : what causes plum tree leaf curl

Last Answer : after the sun goes down and the tree cools off, mix 2 tablespoons of dawn & 1 qt water and spray it good on & under the leaves.........in the fall start the dorment oil..........again in the spring up to closed bud stage........once the bud is open, I only spray the trunk. Happy Summer.

how do you make onion water to treat peach leaf curl

Description : how do you make onion water to treat peach leaf curl

Last Answer : use you blender and cut them up small and whirl them until they are mushy in a couple cups of water........................the strain the juice and add 2 to 3 qts of water.

How do I control leaf curl in my privet hedge? only one bush has it. thanks!

Description : How do I control leaf curl in my privet hedge? only one bush has it. thanks!

Last Answer : I would try a soap bath...sounds like bugs are trying to make a nest...................after the sun goes down mix 1 teasp liquid hand soap & 1 qt of water mix & spray........repeat as necessary..... ... a hat.............mix with water and spray...........keep children & pets away until it dries.

Which of the following plant diseases are caused by viruses? 1. Aster yellows 2. Foot rot of paddy 3. Leaf curl of tobacco 4. Little leaf of Sweet potato Which of the above disease/s is/are caused by the bacteria? (a) 1 and 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 3 and 4

Description : Which of the following plant diseases are caused by viruses? 1. Aster yellows 2. Foot rot of paddy 3. Leaf curl of tobacco 4. Little leaf of Sweet potato Which of the above disease/s is/are caused by the bacteria? (a) 1 and 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 3 and 4

Last Answer : Ans:(a)

Vector for bud necrosis of groundnut is

Description : Vector for bud necrosis of groundnut is

Last Answer : Ans. Thrips (6) Rapseed and Mustard

The vector of sterility mosaic of pigeonpea

Description : The vector of sterility mosaic of pigeonpea

Last Answer : Ans. Mite (Aceria cajani) (5) Groundnut

The vector of Tungro disease

Description : The vector of Tungro disease

Last Answer : Ans. GLH

Mottle leaf of citrus is due to deficiency of

Description : Mottle leaf of citrus is due to deficiency of

Last Answer : Ans. Zinc

Bacterial blight/Angular leaf spot is caused by

Description : Bacterial blight/Angular leaf spot is caused by

Last Answer : Ans. Xanthmonas malvacearum (10) Sugarcane

Alternaria blight or leaf spot of sunflower is caused by

Description : Alternaria blight or leaf spot of sunflower is caused by

Last Answer : Ans. Alternaria helianthi

Late leaf spot of groundnut is caused by

Description : Late leaf spot of groundnut is caused by

Last Answer : Ans. Cercospora parsonata

Early leaf spot of groundnut is caused by

Description : Early leaf spot of groundnut is caused by

Last Answer : Ans. Cercospora arachidicola

Leaf spot of groundnut is also known as

Description : Leaf spot of groundnut is also known as

Last Answer : Ans. Tikka disease

The causal organism of Brown/orange/leaf rust

Description : The causal organism of Brown/orange/leaf rust

Last Answer : Ans. Puccinia recondita

The scientific name of Sugarcane Pyrilla/Leaf hopper

Description : The scientific name of Sugarcane Pyrilla/Leaf hopper

Last Answer : Ans. Pyrilla purpusilla

Curling of leaf upwards and yellowing of terminal cotton shoots is a characteristics symptom of presence of

Description : Curling of leaf upwards and yellowing of terminal cotton shoots is a characteristics symptom of presence of

Last Answer : Ans. Cotton Aphid

The scientific name of Groundnut Leaf minor

Description : The scientific name of Groundnut Leaf minor

Last Answer : Ans. Stomoperyx nertaria (8) Mustard

The scientific name of Green Leaf hopper (GLH)

Description : The scientific name of Green Leaf hopper (GLH)

Last Answer : Ans. Nephotetrix nigropictus

Stomata that is present on only under surface of leaf.

Description : Stomata that is present on only under surface of leaf.

Last Answer : Ans. Apple and Mulberry type

Upper leaves will show chlorosis on midrib, veins green and dead spots occur in all parts of leaf (veins, tips and margins) show

Description : Upper leaves will show chlorosis on midrib, veins green and dead spots occur in all parts of leaf (veins, tips and margins) show

Last Answer : Ans. Zn deficiency

Dia back and Little leaf disease in Citrus shows

Description : Dia back and Little leaf disease in Citrus shows

Last Answer : Ans. Cu deficiency

Cereal crops show ‘V’ shaped pale yellowing at lower leaf tips due to deficiency of

Description : Cereal crops show ‘V’ shaped pale yellowing at lower leaf tips due to deficiency of

Last Answer : Ans. N

Green leaf manuring crops

Description : Green leaf manuring crops

Last Answer : Ans. Karanj and Ipomea

The vector of leaf curl virus

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