Aparallel-plate capacitor is formed from two 3.1 cm -diameter electrodes part what is the charge (in nc) on each electrode? express your answer using two significant figures spaced 1.7 mm apart. the electric fiold strength inside the capacitor is 3.0 x100 n/c

2*10^-3 nC

Explanation: The capacitor of two plates is given by C= εoA/d where A and d , are the area  and the separation of the plates, respectively.

We also know that C=Q/V and V=E*d ( E=electric field between the plates)

From the above expression we have:

Q= εo*A*E= 8.85 ^10-12*7.54 * 10^-4*300= 2*10^-3 nC

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

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: