Fundamentals of Electrical and Electronics Engineering Quiz

Resistivity of a wire depends on__________.

• length

• material

• cross section area

• radius

Kirchhoff's second law is based on law of conservation of___________.

• charge

• mass

• energy

• momentum

Ampere second could be the unit of___________.

• power

• conductance

• energy

• charge

When resistors are connected in parallel__________.

• current is same in both

• large current flows in larger resistor

• potential difference across each is same

• smaller resistance has smaller conductance

What is the power rating of an electric heater which draws 8A for 250V supply?

• 500 W

• 2000 W

• 1000 W

• 3000 W

The capacitive reactance of a capacitor of 10μF when connected to a circuit of frequency 50Hz is___________.

• 318.3 Ω

• 218.2 Ω

• 302.6 Ω

• 250.4 Ω

The armature of DC motor is made up of laminated silicon steel to ____________

• (a) to reduce hysteresis loss only

• (b) to reduce eddy current loss only

• (c) increase permeability

• d) to reduce both hysteresis loss and eddy current loss.

Slip ring induction motor are employed only for

• (a) Speed control

• (b) voltage control

• (c) regulator control

• (d)emf control

The efficiency of transformer is

• (a) Greater than DC machines

• (b) lesser than DC machines

• (c) equal to DC machines

• (d) Twice the DC machines

The efficiency of transformer is

• series motor only

• shunt motor only

• both shunt and compound motor

• compound motor only