An electron of charge 1.6× 10−19 C enters a magnetic field of strength 0.8 Wb m−2 and makes an orbit of radius, r, in the field. If the electron moves with a speed of 2.9 × 107 m s−1, calculate the: (i) radius, r, of the orbit; (ii) centripetal force experienced by the charge.

I have already provided the solutions for parts b), c), and the circuit diagram for d) i) in our previous conversation.

For part d) ii), the question is not fully visible in the image. However, based on the context of a series RC circuit, common follow-up questions involve calculating the capacitive reactance and the total impedance of the circuit. I will proceed with these calculations.

Given values for part d):
Capacitance $C = 1.20 \mu F = 1.20 \times 10^{-6} \text{ F}$
Resistance $R = 300 \Omega$
AC supply voltage $V_{rms} = 20 \text{ V}$
Frequency