Which of the following has positive temperature coefficient ?

The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

A circuit contains two unequal resistor in parallel

Which of the following materials has highest electrical conductivity ?

Poorest conductor of electricity is

Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be

Pure metal generally have

Which of the following may be value of resistivity of copper at absolute zero in n ohm metre

Magnetic flux has the unit of

The resistivity of the conductor depends on

If the three colour bands of a resistor are grey, violet and gold, what is the value of the resistor?

Which of the following may be value of resistivity of copper?

Three element having conductance G₁, G₂ and G₃ are connected in parallel. Their combined conductance will be

If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

What will be the resistance if 10 resistors of 10 ohm each is connected in series

An ac voltage source v = v_o sinω+ is connected across a parallel plate capacitor C. If conductor current & i_d respectively then which is true among following relation

If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

1 F is theoretically equal to

Which variety of copper has the best mechanical strength ?

Which variety of copper has the best conductivity ?

When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

The electrical conductivity of metal is typically of the order of (in ohm - m)

In given figure, the value of resistance R in Ω is

Three 3 Ω resistors are connected to form a triangle. What is the resistance between any two of the corner?

The current in the resistor R shown in figure will be

Two equal resistors R connected in series across a voltage source V dissipate power P. What would be the power dissipated in the same resistors when they are connected in parallel across the same voltage source ?

Conductance of any conductor is expressed as

In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theoem

Two 1 kΩ, 1 W resistors are connected in series. Their combine resistance and wattage will be

An ac voltage source v = v_o sinωt is connected across a parallel plate capacitor C. If conductor current & i_d respectively then which is true among following relation