CMH Lahore Medical & Dental Entry Physics: Practice MCQs with Answers

Practise CMH Lahore Medical & Dental Entry Physics practice MCQs in sets of about 20 questions with instant answers and explanations. This page focuses on mi…

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CMH Lahore Medical & Dental Entry Physics Practice sample MCQs

  1. Q1. The rms value of an AC is defined as the value of that DC which produces the same heating effect in a given resistance.

    • A) Average power dissipation
    • B) Peak current
    • C) Root mean square current
    • D) Instantaneous current

    Answer: Root mean square current

  2. Q2. In an AC circuit, the opposition to the flow of current is called

    • A) Resistance
    • B) Reactance
    • C) Impedance
    • D) Conductance

    Answer: Impedance

  3. Q3. A capacitor in an AC circuit has a reactance given by Xc = 1 / (2πfC). What happens to Xc when frequency is doubled?

    • A) It doubles
    • B) It halves
    • C) It remains the same
    • D) It becomes zero

    Answer: It halves

  4. Q4. The unit of inductance is

    • A) Henry
    • B) Farad
    • C) Ohm
    • D) Tesla

    Answer: Henry

  5. Q5. The power factor of an AC circuit is given by

    • A) cosφ
    • B) sinφ
    • C) tanφ
    • D) cotφ

    Answer: cosφ

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