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Electric Current and Drift Velocity MCQs

Prepare for Electric Current and Drift Velocity MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

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Topic Notes: Electric Current and Drift Velocity

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Master Electric Current and Drift Velocity MCQs for Competitive Exams with our comprehensive, verified question bank. Designed for students and competitive exam aspirants across Pakistan, this study resource provides topic-wise practice questions for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests.

Exam Focus
Aligned with FPSC, PPSC, and CSS syllabus criteria for Electric Current and Drift Velocity.
Past Papers
Includes frequently repeated questions from past examinations.
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Preparation Guide & Key Focus Areas for Electric Current and Drift Velocity MCQs

When preparing for Electric Current and Drift Velocity MCQs (Physics), focus on core definitions, historical timelines, relevant provisions, and commonly tested factual points. Review each question below, test your knowledge against the given options, and inspect the detailed explanation to solidify your understanding.

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31
When there is no electric field, there is no current in a circuit because
32
The phase angle between the voltage and current in an a.c. circuit through a resistor is
33
In an NPN transistor circuit the collector current is 10 mA. If 90% of the electrons are able to reach the collector then
34
Why FET amplifiers are called voltage controlled devices?
35
120. The reason of current flow in PN junction in forward bias is
36
When plate voltage in a diode valve is increased from 100 V to 150 V then plate current increases from 7.5 mA to 12 mA. The dynamic plate resistance will be
37
328. Current is flowing with a current density J = 480 amp/cm2 in a copper wire. Assuming that each copper atom contributes one free electron and given that Avogadro number = 6.0 × 10^23 atoms/mole, density of copper = 9.0 gm/cm^3, atomic weight of copper = 64 gm/mole, electronic charge = 1.6 × 10^-19 coulomb, the drift velocity of electrons is
38
If α = 0.98 and current through emitter I_e = 20 mA, the value of β is
39
If a resistance is connected in parallel with a galvanometer, the resulting instrument is called
40
25. If 10% of the main current is to be passed through the moving coil galvanometer of resistance 99 ohm, then the required shunt resistance will be