An electric dipole is along a uniform electric field: If it is deflected by 60°, work done by an agent is 2 × 10-19 Then the work done by an agent if it is deflected by 300 further is

Question

An electric dipole is along a uniform electric field: If it is deflected by 60°, work done by an agent is 2 × 10-19 Then the work done by an agent if it is deflected by 300 further is (A) 2.5 × 10-19 J (B) 2 × 10-19 J (C) 4 × 10-19 J (D) 2× 10-16 J

Tardigrade Admin · Accepted Answer

Working on electric dipole when deflected by an angle of

6 0^{\circ}

is given by,

W_{1} = U = - PE cos 6 0^{\circ} = - 2 \times 1 0^{- 19} J .

Now, work done in deflecting he dipole by another

3 0^{\circ}

is given by,

W_{1} = - PE cos 9 0^{\circ} = 0

Therefore work done by the agency which deflected dipole by

3 0^{\circ}

mpore is,

W = W_{2} - W_{1} = 0 - (- 2 \times 1 0^{- 19}) = 2 \times 1 0^{- 19} J .

Q. An electric dipole is along a uniform electric field: If it is deflected by $6 0^{\circ}$ , work done by an agent is $2 \times 1 0^{- 19}$ Then the work done by an agent if it is deflected by $3 0^{0}$ further is

$2.5 \times 1 0^{- 19}$ J

$2 \times 1 0^{- 19}$ J

$4 \times 1 0^{- 19}$ J

$2 \times 1 0^{- 16}$ J

Q. An electric dipole is along a uniform electric field: If it is deflected by 60∘, work done by an agent is 2×10−19 Then the work done by an agent if it is deflected by 300 further is

2.5×10−19 J

2×10−19 J

4×10−19 J

2×10−16 J

Q. An electric dipole is along a uniform electric field: If it is deflected by $6 0^{\circ}$ , work done by an agent is $2 \times 1 0^{- 19}$ Then the work done by an agent if it is deflected by $3 0^{0}$ further is

$2.5 \times 1 0^{- 19}$ J

$2 \times 1 0^{- 19}$ J

$4 \times 1 0^{- 19}$ J

$2 \times 1 0^{- 16}$ J