Answer:

ans (c) is correct

Explanation:

By applying left hand rule,

As open your forefinger, middle finger and thumb and arrange them mutually perpendicular.... now point your middle finger in the direction of moving proton and point your forefinger in the direction of magnetic field so the direction shown by your thumb is the direction of force acting on proton...

hope it helps you.......

B) towards the left

A proton enters into uniform magnetic field at right angles to it as shown in the figure. The direction of magnetic force acting on the proton will be  towards the left.

• The direction of force exerted on the proton is perpendicular to the plane of the page, according to Fleming's left-hand rule.
• The magnetic field will exert a force on the proton. The magnetic flux density and proton velocity will both have an impact on the proton's force.
• Proton will flow in the opposite direction, or clockwise, of electron. The magnetic force will be directed upward when the proton first enters the device, forcing the proton's path to bend upward. The magnetic force's direction shifts when the proton starts to ascend; while the proton is travelling straight up, the force is to the left.
• Fleming's left-hand rule can be expressed as stretching the right hand's thumb, middle finger, and forefinger until they are all perpendicular to one another. Here, the middle finger denotes the direction of current in the conductor, while the forefinger denotes the direction of the magnetic field.
• As the proton is not subject to any external forces, its kinetic energy must rise. As the proton's potential energy diminishes, it moves in the same direction as the electric force, which then exerts positive pressure on the proton to boost its kinetic energy.

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