Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1. The ratio of the magnetic field in the interior of 2 to that in the interior of 1 is: 1/3 1 2 4 6

6

Explanation:

The magnetic field inside a solenoid is given by the following formula:

where,

B = Magnetic Field Inside Solenoid

μ₀ = permittivity of free space

n = No. of turns per unit length

I = Current Passing through Solenoid

For Solenoid 1:

For Solenoid 2:

n₂ = 6n₁

Therefore,

Diving equation 1 and equation 2:

Hence, the correct option is:

6

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

it has to be b, about 97 percent.