Electricity & Magnetism MCQs with Answers

If frequency of AC is doubled, the inductive reactance will ?

• A.Be doubled
• B.Be halved
• C.Remain unchanged
• D.Become four times

The conversion of electrical energy into chemical energy is observed in?

• A.Electric generator
• B.Storage battery
• C.Solar panel
• D.Electric motor

Two capacitors C1 = 2μF and C2 = 2μF are connected in series across a 100V supply. Find the effective capacitance?

• A.4 μF
• B.1 μF
• C.2 μF
• D.0.5 μF

EMF of a cell is called?

• A.Resistance
• B.Current
• C.Voltage
• D.Power

The path which is followed by flow of electron is called ?

• A.Circuit
• B.Conductor
• C.Resistor
• D.Insulator

The filament of an electric bulb is made of _?

• A.Aluminum
• B.Copper
• C.Nichrome
• D.Tungsten

A one-meter-long copper rod is moving with a speed of 20 m/s in a magnetic field of strength 0.6 tesla. What is the value of induced emf?

• A.1.2 V
• B.6 V
• C.24 V
• D.12 V

What kind of energy is stored in a dry cell?

• A.Electrical energy
• B.Chemical energy
• C.Mechanical energy
• D.Thermal energy

A _ consists of two conductors separated by a non-conductive region.

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

The force of a magnet at the center is?

• A.Maximum
• B.Zero
• C.Minimum but not zero
• D.Same as at the poles