Question

The quantity expressed in ‘Ohm’ is
Electric resistance
electric current
electric potential
electric potential difference​

Answer 1

Answer:

(i) Electric current is charge (Q) per unit time (t).

It matches with (e).

(ii) Potential difference (V) is work done (W) per unit charge (Q) against electric field.

It matches with (d).

Also potential difference by ohms law is expressed as product of current (I) and resistance (R).

It matches with (f).

(iii) Ohm's law states that the potential difference (voltage V) across an ideal conductor is proportional to the current (I) through it. The constant of proportionality is called the "resistance", R.

This matches with (f).

(iv)Resistivity is an intrinsic property that quantifies how strongly a given material opposes the flow of current and is given by the relation ρ= RA

------

1

.

It matches with (b).

(v) Series combination of resistors is given by sum of individual resistances.t matches with (a).

(vi) Parallel combination of resistors is given by the expression in (c). 1 = 1 + 1

---- ---- ----

R R1 R2

hope this helps you ( ՞ ᗜ ՞ )

Answer 2

Option (a)The quantity expressed in ‘Ohm’ is Electric resistance

Explanation:

• The ohm symbol is an electrical resistance unit named after German physicist Georg Ohm.

• The relationship between current, voltage, and resistance is defined by Ohm's law.

• The potential difference, or voltage, across a large number of materials is directly proportional to the amount of constant current that flows through them.

• V/I = R is a mathematical expression of Ohm's law.

• In the Universal System of Units, the ohm is the standard unit of electrical resistance ( SI ).

• In alternating-current (AC) and radio-frequency (RF) applications, ohms are also used to denote reactance when multiplied by imaginary numbers.