Two parallel conductors carrying currents – problems and solutions

1. Wire P carrying current 6-A upward as shown in the figure below. If µ_o = ၄π.၁၀^-7 wb A^-1 m^-1 and there is a repulsive force between wire P and Q 1.2.10^-5 nm^-1. Determine the magnitude and direction of လျှပ်စစ်စီးကြောင်း on wire Q.

လူသိများသည် : Two parallel conductors carrying currents – problems and solutions 1

I_P = ၃ အမ်ပီယာ

µ_o = ၄π x ၁၀^-7 wb A^-1m^-1

F/l = 1,2 x 10^-5 n m^-1

L = ၁ မီတာ

Wanted: Magnitude and direction of electric current on wire Q

ဖြေရှင်းချက်

The direction of electric current on wire Q :

There is a repulsive force between wire P and Q so that the electric current on wire P has opposite direction with the electric current on wire Q.

On wire P, electric current upward so that on wire Q electric current downward.

လည်းကြည့်ရှုပါ Ohm's law - problems and solutions

Electric current on wire Q :

Two parallel conductors carrying currents – problems and solutions 2

2. Two wires parallel, L, and M are 2-cm apart (see figure). Wire M carries a current of 4-A. Both wires exert a repulsive force on each other 6 x 10^-5 Nm^-1. Determine magnitude and direction of electric current on wire L. (µ_o = ၄π.၁၀^-7 Wb.A^-1m^-1)

လူသိများသည် : Two parallel conductors carrying currents – problems and solutions 3

I_M = ၃ အမ်ပီယာ

µ_o = ၄π x ၁၀^-7 wb A^-1m^-1

F/l = 6 x 10^-5 n m^-1

L = 2 cm = 0.02 m

Wanted: Magnitude and direction of electric current on wire L

ဖြေရှင်းချက်

The direction of the electric current on wire L :

There is a repulsive force between the wire L and the wire M so that the electric current on the wire L is in opposite direction with the current on the wire M.

လည်းကြည့်ရှုပါ တစ်ဖက်မြင်တွင် ပြီးပြည့်စုံစွာ ပျော့ပြောင်းနိုင်သော တိုက်မိမှုများ - ပြဿနာများနှင့် ဖြေရှင်းချက်များ

On the wire M electric current is directed upwards so that on the wire L the electric current is downward.

Electric current on wire L:

Two parallel conductors carrying currents – problems and solutions 4

3. Wire P and Q are 1-m apart. Wire P carrying current 1-A. If µ_o = 4π.10^-7 Wb.A^-1.m^-1and there is an attractive force on each other 10^-7 nm^-1, determine magnitude and direction of electric current on wire Q.

လူသိများသည် :

I_P = ၃ အမ်ပီယာ Two parallel conductors carrying currents – problems and solutions 5

µ_o = ၄π x ၁၀^-7 wb A^-1m^-1

F/l = 10^-7 n m^-1

L = ၁ မီတာ

Wanted: Magnitude and direction of current on wire Q

ဖြေရှင်းချက်

The direction of electric current on wire Q :

There is an attractive force between wire P and wire Q so that the direction of the electric current on the wire P is the same as the direction of current on wire Q.

လည်းကြည့်ရှုပါ တိုင်းတာမှုနှင့် သိသာထင်ရှားသော ကိန်းဂဏန်းများ – ပြဿနာများနှင့် ဖြေရှင်းချက်များ

On wire P the direction of electric current is downward so that on wire Q the direction of electric current is downward.

Electric current on wire Q :

Two parallel conductors carrying currents – problems and solutions 6