Advertisements
Advertisements
Question
Rewrite the following statement by selecting the correct option.
The S.I. unit of resistance is __________.
Options
Ohm
Ampere
Coulomb
Volt
Advertisements
Solution
The S.I. unit of resistance is Ohm.
APPEARS IN
RELATED QUESTIONS
Find the resistance of a conductor if 0.24 A current is passing through it and a potential difference of 24 V is applied across it.
Write the SI unit of resistivity
Name the physical quantity whose unit is "ohm".
The graph between V and I for a conductor is a straight line passing through the origin.
Which law is illustrated by such a graph?
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
State Ohm’s law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.
A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more same or less when the bulb is not glowing?
A wire of resistance 9 ohm having length 30 cm is tripled on itself. What is its new resistance?
In the circuit shown in the figure, find the total resistance of the circuit and the current in the arm AD.

Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of 1 A.
The resistivity of copper = 1.7 × 10–8 Ω m
How does an increase in the temperature affect the specific resistance of a :
(i) Metal and
(ii) Semiconductor ?
What is meant by the drift speed of free electrons?
Choose the correct alternative.
Which of the following is an ohmic conductor?
State Ohm’s law.
Define Current density.
Explain the equivalent resistance of a parallel resistor network.
Two cells each of 5V are connected in series across an 8Ω resistor and three parallel resistors of 4Ω, 6Ω, and 12Ω. Draw a circuit diagram for the above arrangement. Calculate
- the current drawn from the cell
- current through each resistor
Which of the following I-V graph represents ohmic conductors?
The circuit depicted in the figure is employed for studying Ohm’s Law. Instead of using a standard resistor, a student opts for a glass tube filled with mercury (tube 1), connected to the circuit through two electrodes, E1 and E2. He records the readings of the ammeter and voltmeter, thereby calculating the resistance. The student repeats the experiment by substituting tube 1 with tube 2, where the same amount of mercury fills tube 2.

Neglecting internal resistance of the cell use (> or < or =) to compare:
- the resistance in both the cases.
- the voltmeter readings in both the cases.
- the specific resistance in both the cases.
