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