A concave mirror produces four times magnified image of ab object placed at 10 cm in front of the mirror. find the position of image ​

40 cm

Explanation:

We are given that

Magnification of concave mirror, m=4

Object distance, u=-10cm

We have to find the position of image.

We know that

Magnification of concave mirror, m=

Using the formula

Hence, the image is formed at distance 40 cm behind the mirror.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: