List of top Physics Questions on Resistance

A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
If R is the resistance of a conductor of length l, then
A resistor of wire 24 cm length and resistance 8Ω is stretched into a uniform wire of 48 cm length, then the new resistance will be:
Three resistors of 1 Ω, 0.1 Ω and 0.01 Ω are connected in series combination. Their equivalent resistance is
On increasing the temperature, the resistance of copper and germanium respectively
Resistance of a wire of length 0.5 m and area of cross-section 10 mm 2 is 1 Ω. The resistivity (in Ω-m) of the wire is
Of the two bulbs in a house, one glows brighter than the other. Which of the two has larger resistance?
Two resistors of Ω 3 and Ω 2 are connected in series and a potential difference of 5 V is applied across them. The potential difference across Ω2 resistor is
A bulb is marked 100 W and 240 V. The resistance of the bulb is
Four resistors each of 22 are connected in the form of four sides of a parallelogram. The equivalent resistance between any two opposite corners is
Calculate the temperature (in K) at which the resistance of a metal becomes 20% more than its resistance at 300 K. The value of the temperature coefficient of resistance for this metal is \(2.0 \times  10^{-4}\)/K.
The materials which are useful in making of diodes, transistors and integrated chips (ICs) etc. are
The graph between potential difference (on X-axis) and current (on Y-axis) for a conductor gives a straight line
The materials which have resistivity in the order of 1014 to 1016 Ω-m are
When both the length and area of cross-section of a wire are doubled, then the resistance will be
The material which has a resistivity value of about 10x1010 Ω-m at 20 °C is
Four resistors each of 1.5 Q are arranged in the form of a parallelogram. The equivalent resistance between any two opposite corners is
The resistance of a wire of length 1 m and cross-sectional area 1 mm2 is 1Ω. The specific resistance is
\(\frac{6J}{2C}=\)
The sum of two resistors is 6Ω and their equivalent resistance when connected in parallel is 1.5Ω. The product of the two resistances is
For a battery the electromotive force is 1.5 V. Terminal velocity is 1.25 V. power supplied to external resistance is 2.5 W. Find the internal resistance of the battery
The transfer ratio β of transistor is 50. The input resistance of a transistor when used in C.E (common emitter) configuration is 1 kΩ. The peak value of the collector A.C current for an A.C. input voltage of 0.01 V peak is
The temperature co-efficient of resistance of a wire is 0.00125/°C. Its resistance is 1Ω at 300 K. At what temperature, its resistance will be 2Ω?
A letter 'A' is constructed of a uniform wire with resistance 1.0 Ω cm-1. The. 110 sides of the letter are 20 cm and the cross-piece in the middle is 10 cm long. The apex angle is 60°. The resistance between the ends of the legs is
A cylindrical wire is stretched to increase its length by 10%. Percentage increase in its resistance is: