Question

the internal resistance of a cell of emf 2V is 0.1 ohm it is connected to a resistance of 0.9 ohm the voltage across the cell will be A.0.5V B. 1.8V C. 1.95V D. 3V ​

Answer 1

Given;

• V1 = 2V
• R1 = 0.1Ω
• R2 = 0.9Ω
• V2 = ?

Thus by ohm's law ;

• V1 = IR1
• 2 = I × 0.1
• I = 2/0.1
• I = 20A

Thus by ohm's law in the second case;

• V2 = IR2
• V2 = 20 × 0.9
• V2 = 180/10
• V2 = 18 V.

#answerwithquality

#BAL