Question

aos2
26 If resistance of a heating coil is 300 and potential difference is 60V. current passing should be
a) 1A
b) 2A
c) SA
d) ЗА
27 If a charge of one coulomb passing through a cross-sectional area in one second, current is
a) two amperes
b) one ampere
c) half ampere
d) three ampere
28 One milli ampere (mA) is equal to​

Answer 1

Answer:

Question 1 )

Resistance of the Heating Coil : 300 ohms

Potential Difference across the Resistor : 60 V

Current across the Resistor = ?

According to Ohm's Law,

⇒ V = IR

⇒ I = V / R

⇒ I = 60 / 300 = 1 / 5 = 0.2 A

Since the options have only 2 A, the question must have been Resistance equal to 30 ohms or Potential Difference equal to 600 V.

Question 2 )

Charge = 1 C

Time Taken for Crossing = 1 sec

Current = Charge crossing an Area per unit time.

⇒ I = Charge / Time

⇒ I = 1 C / 1 sec

⇒ I = 1 A

Therefore Option b) is the correct answer for Second Question.

Question 3 ) 1 Milli Ampere is equal to ?

The term Milli refers to the magnitude 10⁻³.

Therefore 1 mA = 1 × 10⁻³ A = 0.001 A

Hope it helped !!