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