ECAT Physics — Electromagnetism
Electromagnetism is part of the Physics section of the UET ECAT (30 of the 100 MCQs). It breaks into 5 subtopics, and we hold 23 ECAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (5)
How Electromagnetism is tested
Across the 7 ECAT past papers on ParhaiKrlo, Electromagnetism accounts for 5 questions. It appears in 3 of them, about 1.7 questions a paper. The heaviest was ECAT Past Paper 01, with 3 questions, and the most recent is ECAT Past Paper 06, with 1.
| Paper | Questions |
|---|---|
| ECAT Past Paper 06 | 1 |
| ECAT Past Paper 03 | 1 |
| ECAT Past Paper 01 | 3 |
Electromagnetism MCQs from the ECAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · ECAT Past Paper 06 · Electromagnetism
The direction of the force on a current-carrying conductor placed in a magnetic field is found by:
- A.Fleming's right-hand rule
- B.Fleming's left-hand rule
- C.Lenz's law
- D.Snell's law
Show answer
Answer: B. Fleming's left-hand rule — Fleming's left-hand rule (motor rule) gives the direction of the force on a current in a magnetic field.
- Q2 · ECAT Past Paper 03 · Electromagnetism
An ammeter can be made from a galvanometer by adding a:
- A.Low resistance in parallel
- B.Low resistance in series
- C.High resistance in parallel
- D.High resistance in series
Show answer
Answer: A. Low resistance in parallel — A low-resistance shunt in parallel carries most of the current, so the meter can measure large currents.
- Q3 · ECAT Past Paper 01 · Electromagnetism
A rectangular current-carrying coil is placed in a uniform magnetic field with its plane parallel to the field. The coil experiences:
- A.A net force but no torque
- B.A torque but no net force
- C.Neither a net force nor a torque
- D.Both a net force and a torque
Show answer
Answer: B. A torque but no net force — In a uniform field the forces on opposite sides are equal and opposite (no net force), but they act along different lines, so they form a couple (torque).