Electricity & Magnetism MCQs with Answers

The "opposing" Electromotive Force is often described as a/an _?

• A.Counter Electromotive Force
• B.Induced Electromotive Force
• C.Back Electromotive Force
• D.Residual Electromotive Force

Capacity of a spherical conductor is numerically equal to ?

• A.Radius
• B.Diameter
• C.Surface area
• D.Volume

A voltmeter is always connected in a circuit in ?

• A.Series
• B.Parallel
• C.Series-parallel
• D.None of these

The trade/commercial unit of electrical energy is?

• A.Joule
• B.Watt
• C.KWH
• D.Volt

Which of the following is the main device used in a DC circuit?

• A.Resistor
• B.Capacitor
• C.Inductor
• D.Transformer

The transmission line feeding power on either side of the main transmission line is called?

• A.Primary transmission
• B.Secondary transmission
• C.Tertiary transmission
• D.Distribution line

The path of a charged particle in a plane perpendicular to a uniform magnetic field is?

• A.Parabolic
• B.Straight line
• C.Circular
• D.Elliptical

Charge on an electron is?

• A.9.109 × 10⁻³¹ C
• B.1.602 × 10⁻¹⁷ C
• C.1.602 × 10⁻¹⁹ C
• D.6.022 × 10²³ C

The process of converting an alternating current waveform into a direct current waveform is referred to as _?

• A.Modulation
• B.Amplification
• C.Oscillation
• D.Rectification

In p-type semiconductors, a trivalent impurity is added. Which of the following is an example of such a trivalent impurity?

• A.Phosphorus
• B.Arsenic
• C.Boron
• D.Antimony