Electricity & Magnetism MCQs with Answers

For high current flow in electrical circuits one needs _?

• A.Thin conductors
• B.Insulated conductors
• C.Short conductors
• D.Thick conductors

The combined effect of resistance and reactance is known as?

• A.Conductance
• B.Impedance
• C.Admittance
• D.Inductance

The force on an electron in a field of 1.8 × 10⁻⁸ N/C is:

• A.2.88 × 10⁻¹¹ N
• B.2.88 × 10⁻²⁷ N
• C.1.8 × 10⁻⁸ N
• D.2.88 × 10⁻¹⁹ N

Paramagnetic compounds are _ by the magnetic field.

• A.Attracted
• B.Repelled
• C.Unaffected
• D.Dissolved

In which of the following combinations is the current maximum?

• A.Series
• B.Parallel
• C.Both series and parallel
• D.None of these

An electric field is most directly related to _?

• A.The resistance of a material
• B.The current flowing through a conductor
• C.The magnetic field around a wire
• D.The force acting on a test charge

The best instrument for the measurement of the EMF of a cell is ?

• A.Voltmeter
• B.Ammeter
• C.Potentiometer
• D.Galvanometer

What does one Coulomb represent in terms of charge?

• A.The amount of charge transported by a current of one Ampere in one second
• B.The amount of charge stored in a one Farad capacitor at one Volt
• C.The amount of charge passing through a one Ohm resistor in one second
• D.The amount of charge produced by one Volt across a one Henry inductor

A paramagnetic material had a magnetic field intensity of 10^4 A/m. If the susceptibility of the material at room temperature is 3.7 × 10^-3, the magnetization is:

• A.0.37 A/m
• B.3.7 A/m
• C.370 A/m
• D.37 A/m

The materials through which electricity cannot pass are called?

• A.Conductors
• B.Semiconductors
• C.Insulators
• D.Electrolytes