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Physics-

General

Easy

Question

Two wires AO and OC carry currents i as shown in figure One end of both the wires extends to infinity $angle A O C equals alpha$ , the magnitude of magnetic field at a point P on the bisector of the two wires at a distance r from O is

$\frac{μ_{o} i}{2 π r} c o t (\frac{α}{2})$
$\frac{μ_{o} i}{4 π r} c o t (\frac{α}{2})$
$\frac{μ_{o} i}{2 π r} \frac{(1 + c o s \frac{α}{2})}{\sin (\frac{α}{2})}$
$\frac{μ_{o} i}{4 π r} s i n (\frac{α}{2})$

The correct answer is: $fraction numerator mu subscript o end subscript i over denominator 2 pi r end fraction fraction numerator open parentheses 1 plus c o s invisible function application fraction numerator alpha over denominator 2 end fraction close parentheses over denominator sin invisible function application open parentheses fraction numerator alpha over denominator 2 end fraction close parentheses end fraction$

Related Questions to study

Two identical discs of same radius $R$ are rotating about their axes in opposite directions with the same constant angular speed $omega$ . The discs are in the same horizontal plane. At time $t equals 0$ , the points $P$ and $Q$ are facing each other as shown in figure. The relative speed between the two points $P$ and $Q$ is $V subscript r end subscript$ as function of times best represented by

Two identical discs of same radius $R$ are rotating about their axes in opposite directions with the same constant angular speed $omega$ . The discs are in the same horizontal plane. At time $t equals 0$ , the points $P$ and $Q$ are facing each other as shown in figure. The relative speed between the two points $P$ and $Q$ is $V subscript r end subscript$ as function of times best represented by

Physics-General

Consider the given velocity-time graph It represents the motion of

Consider the given velocity-time graph It represents the motion of

physics-General

2-methoxy butane is obtained by reacting diazomethane with

2-methoxy butane is obtained by reacting diazomethane with

chemistry-General

parallel

The figure shows a circular path of a moving particle. If the velocity of the particle at same instant is $v equals negative 3 stack stack i with dot on top with hat on top minus 4 stack stack j with dot on top with hat on top$ , through which quadrant is the particle moving when clockwise and anti-clockwise respectively

The figure shows a circular path of a moving particle. If the velocity of the particle at same instant is $v equals negative 3 stack stack i with dot on top with hat on top minus 4 stack stack j with dot on top with hat on top$ , through which quadrant is the particle moving when clockwise and anti-clockwise respectively

physics-General

The dehydration of butane-1-ol gives

The dehydration of butane-1-ol gives

chemistry-General

Which of the following reaction is/are feasible?

Which of the following reaction is/are feasible?

chemistry-General

parallel

The preparation of SO₃(g)by reaction $S O subscript 2 end subscript left parenthesis g right parenthesis plus fraction numerator 1 over denominator 2 end fraction O subscript 2 end subscript left parenthesis g right parenthesis rightwards harpoon over leftwards harpoon S O subscript 3 end subscript left parenthesis g right parenthesis$ is an exothermic reaction. If the preparation follows the following temperature-pressure relationship for its % yield, then for temperatures T_1,T₂ and T₃ . The correct option is

The preparation of SO₃(g)by reaction $S O subscript 2 end subscript left parenthesis g right parenthesis plus fraction numerator 1 over denominator 2 end fraction O subscript 2 end subscript left parenthesis g right parenthesis rightwards harpoon over leftwards harpoon S O subscript 3 end subscript left parenthesis g right parenthesis$ is an exothermic reaction. If the preparation follows the following temperature-pressure relationship for its % yield, then for temperatures T_1,T₂ and T₃ . The correct option is

chemistry-General

Lucas reagent is a mixture of:

Lucas reagent is a mixture of:

chemistry-General

If a stone $s$ to hit at a point which is at a distance $d$ away and at a height $h$ above the point from where the stone starts, then what is the value of initial sped $u$ , if the stone is launched at an angle $Q$ ?

If a stone $s$ to hit at a point which is at a distance $d$ away and at a height $h$ above the point from where the stone starts, then what is the value of initial sped $u$ , if the stone is launched at an angle $Q$ ?

physics-General

parallel

Match the following and mark the correct options

Match the following and mark the correct options

A point mass $m$ is suspended from a light thread of length $l comma$ fixed at $O$ , is whirled in a horizontal circle at constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are

A point mass $m$ is suspended from a light thread of length $l comma$ fixed at $O$ , is whirled in a horizontal circle at constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are

Physics-General

The frequency of a FM transmitter without signal input is called

The frequency of a FM transmitter without signal input is called

physics-General

parallel

In a communication system, noise is most likely to affect the signal

In a communication system, noise is most likely to affect the signal

physics-General

In the satellite communication, the uplinking frequency range is

In the satellite communication, the uplinking frequency range is

physics-General

Frequency range used in down linking in satellite communication is

Frequency range used in down linking in satellite communication is

physics-General

parallel

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