Quelpr
1 markAlternating Currents

CAPE Physics Unit 2 · 2003 · Paper 2 · Question 7(a)(i)

Alternating voltages and currents.

State the relationship between peak voltage, V_p, and root mean square voltage, V_rms, for an alternating sinusoidal voltage.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 7(a)(ii)Calculate the value of the direct current that will produce the same quantity of thermal energy in a particular resistor, as an alternating current that has a…[2 marks]
  2. 7(b)Explain the operation of an ideal transformer when a small alternating voltage is supplied to its primary winding.[7 marks]
  3. 7(c)(i)Calculate the turns ratio, N_p / N_s, of the transformer.[2 marks]
  4. 7(c)(ii)The average rate of energy consumption in the houses served by the transformer is 78 kW. Calculate the peak value of the current in BOTH windings of the…[5 marks]
  5. 7(c)(iii)Calculate the resistive load in the secondary circuit of the transformer.[3 marks]

More practice: the rest of this paper · more Alternating Currents questions · all CAPE Physics Unit 2 past papers