Force on a Finite Wire
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A rectangular loop ABCD, carrying a current 15 A, is placed near a long wire carrying a current 40 A. The resultant force acting on the loop is
6.4×10−2 N directed away from wire
6.4×10−2 N directed towards wire
3.6×10−2 N directed away from wire
3.6×10−2 N directed towards the wire
- 3×104 N.
- 3×102 N.
- 3×10−2 N.
- 3×10−4 N.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/752797/original_2._question.png)
- 24 N
- Zero
- 16 N
- 8 N
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/15119/content_64.png)
- Zero
- 5 N
- 30 N
- 20 N
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/15127/content_66.png)
- iλB
- Zero
- iλB2
- 32iλB
A rectangular loop ABCD, carrying a current 15 A, is placed near a long wire carrying a current 40 A. The resultant force acting on the loop is
6.4×10−2 N directed away from wire
6.4×10−2 N directed towards wire
3.6×10−2 N directed away from wire
3.6×10−2 N directed towards the wire
Two long parallel wires carrying currents 2.5 A and "I" A in the same direction (directed in the o plane) are held at P and Q respectively as shown. The points P and Q are located at a distance of 5 m and 2 m respectively from a collinear point R. An electron moving with a velocity of 4×105 ms−1 along the positive x-axis experiences a force of magnitude 3.2×10−20 N at the point R. The value of I is
8 A
6 A
4 A
2 A
[MP PET 1993]
- μ0i2√2πd
- μ0i22πd
- 2μ0i2πd
- √2μ0i2πd
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/752797/original_2._question.png)
- 24 N
- Zero
- 16 N
- 8 N
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/759152/original_2a.png)
- x. direction
- y-direction
- z-direction
- None of these
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/616280/original_7.png)
- mgIlsin θ
- mgIltan θ
- mg cosθIl
- mgIl sin θ
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/43377/content_1.png)
- μ0i22π, loge(a+la), μ0i2l2π
- zero, μ0i2l2π
- μ0i22πln(la), μ0i2l2π
- μ0i22πln(l+aq), zero
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/16108/content_1.jpg)
- √2
- 1√2
- 1
- 32
Two long parallel wires carrying currents 2.5 A and "I" A in the same direction (directed in the o plane) are held at P and Q respectively as shown. The points P and Q are located at a distance of 5 m and 2 m respectively from a collinear point R. An electron moving with a velocity of 4×105 ms−1 along the positive x-axis experiences a force of magnitude 3.2×10−20 N at the point R. The value of I is
8 A
6 A
4 A
2 A