A long straight wire carrying a current I1 is kept along the axis of a circular loop carrying a current I2, Then the long wire will

1. Exert an inward force on the loop
2. Exert an outward force on the loop
3. Not exert any force on the loop
4. bend the loop

if anyone can explain with an illustration the angle between length vector and magnetic field it would be really helpful

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11

21

31

41