Electricity & Magnetism MCQs with Answers

The decrease in the terminal voltage of a shunt generator is due to ?

• A.Armature Resistance
• B.Field Resistance
• C.Load Resistance
• D.Brush Contact Resistance

An infinite sheet with an electric field strength of 50 N/C is placed 2 m away. If it is moved to 4 m away, what will be the value of the electric field strength?

• A.25 N/C
• B.100 N/C
• C.50 N/C
• D.12.5 N/C

Kirchhoff's voltage rule is a way of stating conservation of ?

• A.Charge
• B.Momentum
• C.Energy
• D.Mass

Electrical charge is measured in unit of _?

• A.Ampere
• B.Coulomb
• C.Volt
• D.Ohm

When an iron piece is magnetized, its length _?

• A.Increases slightly
• B.Decreases slightly
• C.Remains unchanged
• D.First decreases then increases

The magnitude of force between two unit positive charges when the distance between them is 1m would be?

• A.9 × 10⁹ N
• B.1 N
• C.9.8 N
• D.0 N

What is the slope of the I-V graph?

• A.Resistance
• B.Conductance
• C.Capacitance
• D.Inductance

A resistance R is placed in parallel with another resistance 40Ω and their equivalent resistance is 24Ω. What is the value of R?

• A.50Ω
• B.60Ω
• C.70Ω
• D.80Ω

Kirchhoff's Voltage Law (KVL) is based on the principle of conservation of ?

• A.Charge
• B.Energy
• C.Momentum
• D.Mass

Three capacitors each of capacitance 2 µF are connected in parallel to a 12V battery. Their equivalent capacitance is?

• A.2 µF
• B.2/3 µF
• C.6 µF
• D.3/2 µF