Electricity & Magnetism MCQs with Answers

Magnetic field used in a moving coil galvanometer is _?

• A.Uniform
• B.Radial
• C.Parallel
• D.Circular

Which of the following cannot be connected in parallel because KVL (Kirchhoff's Voltage Law) is not valid?

• A.Resistors with different resistance
• B.Capacitors with different capacitance
• C.Batteries with different EMF
• D.Inductors with different inductance

Which of the following explains the principle of working of a capacitor?

• A.Charge is changed while keeping electric potential constant
• B.Electric potential is changed while keeping charge constant
• C.Both charge and electric potential are kept constant
• D.Charge flows continuously through the dielectric

When a magnet is suspended freely, its north and south poles always point towards?

• A.Geographic equator and prime meridian respectively
• B.East and West directions respectively
• C.South and North poles of earth respectively
• D.North and South poles of earth respectively

Which of the following is not ferromagnetic?

• A.Iron (Fe)
• B.Cobalt (Co)
• C.Nickel (Ni)
• D.Antimony (Sb)

Which of the following statement is incorrect for any magnetic field lines?

• A.Magnetic field lines form closed loops
• B.Magnetic field lines never intersect each other
• C.Magnetic field is strongest when the lines are farthest
• D.Magnetic field lines travel from north to south pole outside the magnet

When the area is perpendicular to the electric field, the electric flux is?

• A.Maximum
• B.Minimum
• C.Zero
• D.None of these

The formula V = W/q₀ represents _?

• A.Electric current
• B.Electric potential
• C.Electric resistance
• D.Electric power

With an increase in the number of unpaired electrons, paramagnetism:

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

is a component that conducts current in one direction only.

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