An ideal (100% efficient) step-up transformer has a primary voltage VpV_{\text{p}}Vp and a primary current IpI_{\text{p}}Ip. Which option correctly compares the secondary voltage VsV_{\text{s}}Vs with VpV_{\text{p}}Vp and the secondary current IsI_{\text{s}}Is with IpI_{\text{p}}Ip?
Secondary voltage is greater than VpV_{\text{p}}Vp and secondary current is greater than IpI_{\text{p}}Ip
Secondary voltage is greater than VpV_{\text{p}}Vp and secondary current is less than IpI_{\text{p}}Ip
Secondary voltage is less than VpV_{\text{p}}Vp and secondary current is greater than IpI_{\text{p}}Ip
Secondary voltage is less than VpV_{\text{p}}Vp and secondary current is less than IpI_{\text{p}}Ip
275 exam-style questions on CIE IGCSE Physics 4.5 Electromagnetic effects, covering 4.5.1a Electromagnetic induction, 4.5.1b Direction of an induced e.m.f., 4.5.2 The a.c. generator, 4.5.3a Magnetic effect of a current and its applications, 4.5.3b Strength and direction of the field around wires and solenoids, 4.5.4a Force on a current-carrying conductor, 4.5.4b Force on beams of charged particles, 4.5.5 The d.c. motor, 4.5.6a Construction and operation of a transformer, 4.5.6b Turns ratio and current in a transformer, and 4.5.6c High-voltage transmission of electricity. Each one has a worked solution and a mark scheme showing where the marks go.