Question
An electric dipole of length 10 cm, when placed with its
axis making an angle of 30° with a uniform electric field, experiences a torque of 2√3 Nm. Calculate the potential energy of the dipole, if it has a charge of ±2 nC.Solution
Torque experienced at this point (τ) = 2√3Nm The angle at which the dipole is placed θ = 30° Torque on the dipole, τ = PEsinθ Potential energy of the dipole, U = −PEcos(θ) U/ τ =−{PEcos(θ)}/{PEsinθ) Since, U = −τcotθ = - 2√3 × √3 = - 6 J
In the question below there are three statements followed by three conclusions I, II and III. You have to take the four given statements to be true eve...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at varian...
Statements: Some pins are mirrors. Â
All mirrors are boxes.
Conclusions:I. Some boxes are pins.Â
 II. Some boxes are mirrors.
Statements:Some pastries are cakes.
No cake is a pudding.
All puddings are sweets.
Conclusions:I. Some sweets are not cakes.
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
Statements:
All tomatoes are potatoes.
All potatoes are onions.
Conclusions:
I. Some potatoes are tomatoes.
II. All tomatoes are onions.
Statements:
Some Traditions are Creeds.
All Creeds are Cultures.
A few Cultures are Castes.
No Value is a Caste.
Conc...
Statements: Some papers are copies.
No copy is a diary.
Some diary are cardboard.
Conclusions:I. No diary is papers.
II....
Statement:
I) Some pink are red
II) Some red are green
III) All green are yellow
IV) No yellow is blue
Conclusion:
Statement : All times are distances.
All distances are trains.
All trains are averages.
No average is speed.
Conclusion:<...
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