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WorksheetsBasic Electrical Engg
Total questions: 20
Worksheet time: 10mins
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
The peak value of a sine wave is 200V.Its average value is
127.4V
141.4V
282.8V
200V
For a frequency of 200Hz, the time period will be
o.o5s
0.005s
0.0005s
0.5s
Electric pressure is also called as
resistance
power
voltage
energy
The property of a conductor due to which it passes current is called
resistance
reluctance
conductance
inductance
Ohm's law is not applicable to
vacuum tubes
carbon resistors
high voltage circuits
circuits with low current densities
Which is the best conductor of electricity?
Iron
Silver
Copper
Carbon
A closed switch has a resistance of
zero
about 50 ohms
about 500 ohms
infinity
An electric filament bulb can be worked from
D.C. supply only
A.C. supply only
Battery supply only
All the above
The filament of an electric bulb is made of
carbon
aluminium
tungsten
nickel
As per Faraday's Laws of Electromagnetic Induction, an e.m.f. is induced in a conductor whenever it
lies perpendicular to the magnetic flux
lies in magnetic field
cuts magnetic flux
moves parallel to the direction of the magnetic field
