List of top Physics Questions on Resistance

20R resistance wire is cut into 10 equal parts. Now each part first is connected in series and then in parallel. Find ratio of equivalent resistance in both cases (Rseries : Rparallel)

The resistance \( R = \frac{V}{I} \) where \( V = (200 \pm 5) \, \text{V} \) and \( I = (20 \pm 0.2) \, \text{A} \). The percentage error in the measurement of \( R \) is:

To increase the range of an ammeter, we need to connect a suitable :
In the figure, a conducting ring of certain resistance is falling towards a current carrying straight long conductor. The ring and conductor are in the same plane. Then the
a conducting ring of certain resistance
A p -n junction diode is connected to a battery of emf 5.7 V in series with a resistant 5kΩ such that it is forward biased. If the barrier potential of the diode is 0.7 V, neglecting the diode resistance, the current in the circuit is
In the diagram shown, the Zener diode has a reverse breakdown voltage of VZ . The current through the load resistance RL is IL The current through the Zener diode is
the Zener diode has a reverse breakdown voltage of VZ
An induced current of 2 A flows through a coil. The resistance of the coil is 10Ω . What is the change in magnetic flux associated with the coil in 1 ms ?

A galvanometer has a resistance of 96 Ω  and it is desired to pass 4% of the total current through it. The value of shunt resistance is ____?

A 5V battery with internal resistance 2Ω and a 2V battery with internal resistance 1Ω are connected to a 10Ω resistor as shown in the figure. The current in the 10Ω resistor is
The nucleus of which of the following atoms whose atomic mass numbers 'A' are given in the options would have the highest binding energy per nucleon?
An ammeter reads 0 to 10 A. It has negligible resistance.To convert this into voltmeter to read upto 250 V, resistance to be used is
Two wires of the same material having equal area of cross section have lengths L and 2L. Their respective resistances are in the ratio
A cubical arrangement of 12 resistors each having resistance R is shown. Find I.
A cubical arrangement of 12 resistors each having resistance R is shown. Find I.
Consider the network shown:

The equivalent resistance of the network is
An aluminium rod and a copper rod are taken such that their lengths are same and their resistances are also same. The specific, resistance of copper is half that of aluminium, but its density is three times that of aluminium. The ratio of the mass of aluminium rod and that of copper rod will be
Two electric bulbs, one of $200\, V$, $40\, W$ and other of $200\,V$, $100 \,W$ are connected in a domestic circuit. Then
The masses of three copper wires are in the ratio 5:3:1 and their lengths are in the ratio 1:3:5. The ratio of their electrical resistance is
The length of a conductor is halved. Its conductivity will be
A circuit consists of five identical conductors as shown in figure. The two similar conductors are added as indicated by the dotted lines. The ratio of resistances before and after addition will be