Current Electricity - Jamb Physics Past Questions and Answers

Question 86:

• JAMB 2000

In the diagram above, the values of V₁ and V₂ are respectively

A. 1V and ¹/₃V
B. ¹/₃V and 1V
C. ¹/₃V and ²/₃V
D. 1V and ²/₃V

Question 87:

• JAMB 2001

A cell of internal resistance r supplies current to a 6.0Ω resistor and its efficiency is 75%. Find the value of r.

A. 4.5Ω
B. 1.0Ω
C. 8.0Ω
D. 2.0Ω

Question 88:

• JAMB 2001

A resistance R is connected across the terminal of an electric cell of internal resistance 2Ω and the voltage was reduced to 3/5 of its nominal value.
The value of R is

A. 3 Ω
B. 2 Ω
C. 1 Ω
D. 6 Ω

Question 89:

• JAMB 2001

A cell can supply current of 0.4 A and 0.2 A through a 4.0Ω and 10.0Ω resistors respectively.
This internal resistance of the cell is

A. 2.0Ω
B. 1.0Ω
C. 2.5Ω
D. 1.5Ω

Question 90:

• JAMB 2001

In the diagram above , the current I is

A. ³/₈
B. ⁹/₁₁
C. ¹¹/₉
D. ⁸/₃