SSC JE Electrical / Mock Test Series : 1

Unit of resistivity is

The unit of magnetic flux is –

The RMS value of a sine wave is 100 A. Its peak value is –

Statically induced E.M.F’s magnitude depends on the –

RMS value can be defined based on which of the following? –

Unit of impedance is

The power factor of an ordinary electric bulb is

Which is the property of a coil by which a counter E.M.F is induced when the current through the coil changes?

The alternative name/names for active power is/are –

What is the RMS value of the current if the maximum value of sine wave current is 100 A?

RMS value can be defined based on which of the following? –

Which of the following is unit less?

Sparking may occurs when a load is switched off due to the presence of –

Real part and imaginary part of admittance are respectively –

RMS value can be defined based on which of the following? –

The reciprocal of permeability is –

The equation for instantaneous value of alternating current is, then time period will be –

When a sine wave has a frequency of 100 Hz in 12 s it goes through

Magnetic field has -

The unit of frequency is the hertz

The instantaneous value is the voltage or current value of a waveform at its peak

Principle of dynamically induced E.M.F is used in a –

To obtain a high value of capacitance, the permittivity of dielectric medium should be –

When an alternating current passes through an Ohmic resistance the electrical power converted into heat is –

Magnetic field strength is

Which of the following statements are true with regard to resistivity?

Which of the following will not be affected due to change in R?

Which DC motor is preferred for wide range of speed regulation?

What is the power in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?

The Inductor doesn’t allow sudden changes in

Which of the following is used to determine the direction of rotation of D.C motor?

Materials which easily allow the passage of electric current are known as ______

Which of the following statements are true with regard to resistance?

What will be the Q-factor of a circuit, if power factor is 0.9?

What is the relation between resistance R and resistivity ρ of a wire ?

With the star delta starter the voltage across the motor winding at starting is – 

Magnetic lines of forces –

The direction of rotation of a dc generator is found out by

The currents in the three branches of a parallel circuit are 3 A, 4 A and 5 A. What is the current leaving it?

The capacitor doesn’t allow sudden changes in

The flow of electron in solids is due to –

What is the voltage measured across a series short?
a) b)  c)  d) 

Reactive power is the product of

The component of current which is in quadrature with supply voltage, is –

The expression for energy of an inductor

The current in each branch of a parallel circuit is proportional to _________

The average half-cycle value of a sine wave with a 40 V peak is

The direction of rotation of a dc motor is found out by

What is the relation between resistance R and resistivity ρ of a wire ?

Strength of the electromagnet can be increased by increasing –

The resistance of straight conductor is independent of-

The induced E.M.F. and current always oppose the cause of producing them is according to which law?

The length of a phasor represents the amplitude

What is the resistivity of Copper?

The square waveform of current has following relation between R.M.S. value and average value –

Three nos 6-ohm resistances are connected in delta. Value of resistances if connected in star – 

Magnetic field is proportional to the –

The principle of electromagnetic induction was propounded by

The frequency of an alternating current is –

The frequency of an AC voltage in India, is–

Which is the most cost efficient connection?

The power factor of an AC circuit lies between –

Two waves of the same frequency have opposite phase when the phase angle between them is –

One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

The duty cycle of a pulse waveform with a pulse width of 10 µs and a period of 100 µs is 25%.

The most important advantage of using electrical energy in the form of a AC is –

What happens to the current in the series circuit if the resistance is doubled?

Periodic is characterized by a repetition at fixed time intervals

The reciprocal of resistivity is________

Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out? –

The formula used to find the capacitance C is __________

Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out?

Many resistors connected in series will?

The power factor of practical inductor is

Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out? –

Transformer is a

Which rule do we use to predict the direction of movement of a current carrying wire in a magnetic field?

S.I unit of Power is –

Magnetic lines of forces –

The units for inductance is _________ and capacitance is ___________

Resistance of any circuit depends on –

Magnetic circuit is a closed path followed by –

The insulating medium between the two plates of capacitor is known as __________

Which, among the following is a unit for resistivity?

The form factor for a sinusoidal a.c. voltage is – 

The voltage across the open circuit is?

The peak value of a sine wave is 200 V. Its average value is –

Paramagnetic materials are –

Unit of magnetic flux density is in S.I.

Transformer core are laminated in order to reduce –

The energy stored by a capacitor is given by –

The voltage across the short is?

What is the value of x if the current in the circuit is 5 A?

S.I unit of conductance is –

The frequency of an AC voltage,e= 100 cos 314t , will be –

The energy per unit charge is

S.I unit of Reluctance-

The total resistance between A and B are?

Voltage across the 60 ohm resistor is______

When a permanent magnet is cut half what will be the result?