Question

Question 20:
(a) What is the ratio of potential difference and current known as ?
(b) The values of potential difference V applied across a resistor and the corresponding values of current I
flowing in the resistor are given below :

(c) Name the law which is illustrated by the above V-I graph.
(d) Write down the formula which states the relation between potential difference, current and resistance,
(e) The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron ?

Lakhmir Singh Physics Class 10

Answer 1

Hello Students,

◆ Answers -

(a) The ratio of potential difference and current known as resistance.

(b) Question is incomplete.

(c) Ohm's law is illustrated by V-I graph.

(d) Relationship between voltage, current and resistance is given by formula V = RI.

(e) Resistance of electronic iron is given by

R = V/I = 240/5 = 48 ohm

Thanks dear...

Answer 2

Answers

(a) The ratio of potential difference and current known as RESISTANCE.

(c)  Ohm's Law illustrates any V-I graph.

(d) V= IR

      This is equation which states the relation between

      potential difference,current and resistance.

(e) V = IR

Given, V = 240V and I = 5A

∵ R = $\frac{V}{I}$    ⇒     R = 48 ohm.