NUMS Mdcat 2022 | Solved with Explanation | mosaicbro.com
NUMS Mdcat 2022 | Solved with Explanation
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Review Answers:
64
It stores electrical potential energy:
Correct Answer:A
Explanation:
A capacitor stores energy in the form of an electric field.
65
A magnitude of the current in metals is proportional to the applied voltage as long as temperature of conductor is kept constant. It is statement of:
Correct Answer:C
Explanation:
Ohm's law states V ∝ I (at constant temperature).
66
The resistance of pure metal increases with:
Correct Answer:A
Explanation:
Resistance of metals increases with temperature due to increased lattice vibrations.
67
The magnetic field inside the current carrying wire varies:
Correct Answer:A
Explanation:
Inside a wire, the magnetic field (B) is proportional to the distance from the center (B ∝ 1/r).
68
Magnetic flux is maximum when angle between magnetic field and vector area is:
Correct Answer:A
Explanation:
Magnetic flux (Φ = BAcosθ) is maximized when θ = 0° (cos0° = 1).
69
Lenz's law is based on the law of conservation of:
Correct Answer:B
Explanation:
Lenz's law ensures that induced currents oppose the change in flux, conserving energy.
70
In Fleming's right hand rule, the thumb indicates:
Correct Answer:D
Explanation:
Thumb = Motion, Forefinger = Field, Middle finger = Current (for generators).