9702/04/SP/22 · question 1 of 1 in this topic
A bar magnet of mass 250 g is suspended from the free end of a spring, hanging so that one pole is near the centre of a coil of wire; the coil is connected in series with a resistor and an open switch. The magnet is displaced vertically and then allowed to oscillate. At time t = 0 the magnet is oscillating freely; at t = 6.0 s the switch is closed.
For the oscillating magnet, use data from Fig. 3.2 to determine, to two significant figures, the frequency f.
Your answer
Suggested time: 3 min
A bar magnet of mass 250 g is suspended from the free end of a spring and oscillates vertically; one pole is near the centre of a coil connected in series with a resistor and a switch. At t = 0 the magnet oscillates freely; at t = 6.0 s the switch is closed.
For the oscillating magnet, use data from Fig. 3.2 to determine, to two significant figures, the energy of the oscillations during the time interval t = 0 to t = 6.0 s.
Your answer
Suggested time: 5 min
A bar magnet of mass 250 g suspended from a spring oscillates with one pole near the centre of a coil connected in series with a resistor and a switch. At t = 6.0 s the switch is closed.
When the switch is closed, the oscillations are damped. Explain, with reference to Fig. 3.2, whether this damping is light, critical or heavy.
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
Your answer
Suggested time: 2 min
9702/04/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 4 · sit the whole paper