MCQ Collection
MDCAT Physics MCQs
Practice MDCAT Physics questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: D. Induced current opposes the change that produces it
Explanation:
Lenz's law gives the direction of induced current.
It reflects conservation of energy.
Choose an option to check your answer.
Correct Answer: C. Potential energy per unit charge
Explanation:
Electric potential is a scalar measured in volts.
Potential difference drives charge movement in circuits.
Choose an option to check your answer.
Correct Answer: D. Rate of flow of electric charge
Explanation:
Current is I=Q/t.
Its SI unit is the ampere.
Choose an option to check your answer.
Correct Answer: A. Energy transferred per unit charge
Explanation:
Potential difference is V=W/Q.
One volt equals one joule per coulomb.
Choose an option to check your answer.
Correct Answer: B. Opposition to electric current
Explanation:
Resistance relates voltage and current through Ohm's law.
Its SI unit is the ohm.
Choose an option to check your answer.
Correct Answer: C. Current is proportional to voltage for a conductor at constant physical conditions
Explanation:
An ohmic conductor has V=IR under constant temperature and conditions.
Its V-I graph is linear through the origin.
Choose an option to check your answer.
Correct Answer: D. Their resistances add directly
Explanation:
Series resistors carry the same current.
The voltage drops add to the source voltage.
Choose an option to check your answer.
Correct Answer: A. Reciprocals of resistances add
Explanation:
Parallel resistors share the same voltage.
The total resistance is less than the smallest branch resistance.
Choose an option to check your answer.
Correct Answer: B. Rate at which electrical energy is transferred
Explanation:
Electrical power can be written P=VI.
It may also be expressed as I²R or V²/R.
Choose an option to check your answer.
Correct Answer: C. Electric charge and energy in an electric field
Explanation:
A capacitor consists of separated conductors.
Its capacitance measures charge stored per unit potential difference.
Choose an option to check your answer.
Correct Answer: D. Charge stored per unit potential difference
Explanation:
Capacitance is C=Q/V.
Its SI unit is the farad.
Choose an option to check your answer.
Correct Answer: A. A region where magnetic forces act on magnets or moving charges
Explanation:
Magnetic fields are produced by magnets and moving charges.
Their direction is indicated by field lines.
