Electricity & Magnetism MCQs with Answers

In an oscillating LC circuit, the total stored energy is U. The maximum energy stored in the capacitor during one cycle is?

• A.U/2
• B.U/4
• C.2U
• D.U

Which metal is the second best conductor of electricity after silver?

• A.Gold
• B.Copper
• C.Aluminium
• D.Iron

A current-carrying conductor would move when placed in a magnetic field was discovered by?

• A.Hans Christian Oersted
• B.Michael Faraday
• C.Andre Ampere
• D.James Clerk Maxwell

Which type of materials have conductivity that lies between insulators and conductors?

• A.Superconductors
• B.Electrolytes
• C.Dielectrics
• D.Semiconductors

The flow of charge that changes direction periodically is called?

• A.Direct Current (DC)
• B.Static Electricity
• C.Alternating Current (AC)
• D.Eddy Current

Materials that block flow of electrons are called _?

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

The output of an OR gate will be high when ?

• A.Any of the inputs is high
• B.All inputs are high
• C.All inputs are low
• D.None of these

Full wave rectification is given by ?

• A.A single diode
• B.Two diodes connected in series
• C.Four diodes connected in bridge type arrangements
• D.Three diodes connected in parallel

The magnetic field lines due to a current carrying wire is ?

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

The value of maximum electric flux is obtained when angle between E and A is ?

• A.180°
• B.45°
• C.90°
• D.0°