Current electricity: JAMB Physics Past Questions and Answers

What the JAMB syllabus covers in Current electricity

Our summary: Current, voltage, resistance and internal resistance, resistors in circuits and ways of measuring them.

• Electromotive force (e.m.f.), potential difference (p.d.), current, internal resistance of a cell and lost volt
• Ohm's law, resistivity and conductivity
• Measurement of resistance
• Meter bridge
• Resistance in series and in parallel and their combination
• The potentiometer method of measuring e.m.f., current and internal resistance of a cell
• Electrical networks

Objectives

• differentiate between e.m.f., p.d., current and internal resistance of a cell;
• apply Ohm's law to solve problems;
• use metre bridge to calculate resistance;
• compute effective total resistance of both parallel and series arrangement of resistors;
• determine the resistivity and the conductivity of a conductor;
• measure e.m.f., current and internal resistance of a cell using the potentiometer;
• identify the advantages of the potentiometer;
• apply Kirchhoff's law in electrical networks.

Syllabus content © The Joint Admissions and Matriculation Board (UTME).