Basic Electrical Engg

Which of the following will remain the same in all parts of a series circuit?

• Voltage

• Current

• Power

• Resistance

The power factor of a purely resistive circuit is

• zero

• unity

• lagging

• leading

The r.m.s. value of sinusoidal 100 V peak to peak is _________ volt.

• 100√2

• 50/√2

• 50

• 100

Property of an electric circuit that dissipates electric

energy:

• Reactance

• Resistance

• Impedance

• Conductance

Resistor with colored bands in the body

• Wire-wound resistor

• Carbon-composition resistor

• Potentiometer

• Rheostat

In an ac circuit with inductive reactance, the

• Phase angle of the circuit is always 45°

• Voltage across the inductance must be 90° out-of-phase with the applied voltage

• Current through the inductance lags its induced voltage by 90°

• Current through the inductance and voltage across it are l80° out-of-phase

Kirchhoff’s laws (KCL and KVL) are applicable to:

• DC circuits

• AC circuits

• Passive networks alone

• DC as well AC circuits

If two equal resistances connected in series across a certain supply are now connected in parallel across the same supply, the power produced will be __________ that of series connection:

• One-half

• Four times

• One-fourth

• Two times

The form factor is the ratio of

• peak value to r.m.s. value

• r.m.s. value to average value

• average value to r.m.s. value

• none of the above

A heater is rated at 230V, 10kW, AC. The 230V refers to

• average value

• r.m.s. voltage

• peak voltage

• none of the above