What is the S.I unit of specific resistance?
The specific resistance of a substance depends on
Which law states that the sum of the currents meeting at junction is equal to zero?
The armature of d.c. generator is laminated to
If a 200 watts lamp is connected across a 250 volt source then what will be the circuit current ?
The principle of operation of an induction motor is based on:
Squirrel-cage induction-motor differs from a slip-ring induction-motor as it has no
Which is the example for negative temperature coefficient substance?
Which material is having negative temperature coefficient? (
A 6 pole, 50 Hz, 3 phase induction motor has a full load speed of 950 R.P.M. At half load, its speed would be
The 10 pole D.C generator has 960 armature conductors and a flux per pole of 20 mwb running at 600 rpm. Calculate the e.m.f generated when the armature is connected in simplex wave winding?
What metals contained in brass alloy?
What is the unit of power?
The speed of a series motor at no-load is
A fuse in a circuit provides protection against.....
What is the power input to an electric heater, that draws 4 amperes at 250 volts supply source?
Armature cores are commonly made of
Hack Saw blades are made up of......
An appliance has a resistance of 100 ohms, takes 2 amperes. What is the power consumed by the appliance?
Which type of resistor is used for Arc quenching protection in circuit breakers?
A capacitor-start, single-phase motor will usually have a P.F. of:
What is the purpose of a lubricant?
What is the unit of strain?
Calculate the hot resistance value of the lamp 200 watts/250 volts?
A synchronous motor is started on:
What is the centre of gravity of a rectangular body?
. As per Ohm's law statement in the circuit, current is directly proportional to........
What is the radius of a circle whose diameter is 44 cm?
Which type of fire extinguisher is used for fire on electrical equipment?
The ELCB expansion form is
Which affects the centre of gravity of the object?
Calculate the value of resistance by colour coding method.
The fixed value Carbon Resistors are generally not more than...... Watts
The direction of rotation of a synchronous motor can be reversed by reversing
. The formula to find EMF induced (E) in DC generator is
Motor used in electric traction is
What is the profit amount, if the i - phone cost price is Rs.50000/- and selling price is Rs.70000/-?
The electric motor generally used in house hold food mixers is
the distance between two adjacent teeth of hack saw blades are called as
The number of electrical degrees which passes through in one revolution of a 6 pole alternator is:
The back emf of a DC motor depends on the
What is the centre of gravity of a right circular cone from its base?
Calculate slip of an induction motor if it has 4 poles, 50Hz, rotor speed is 1400 rpm.
What is the function of a centrifugal switch?
The given Wheatstone bridge is balanced when P= 100 2; Q=1k2 and S = 120 £2. Calculate the value of the unknown resistance.
In d.c. generators, lap winding is used for
What is the ratio of 4 kg to 800 grams?
The voltage generated by a generator is determined by the equation:
Which type of fire extinguisher must NOT be used for electrical base fire?
which metal is used in electric lamp filament
What are the two classifications of system of units?
What is the formula for kinetic energy?
What is the possible range to measure the size of the wire in a Standard Wire Gauge (SWG)? |
The RMS value of emf induced per phase in alternator is given as .........
