Current Electricity - Jamb Physics Past Questions and Answers

Question 91:

• JAMB 2001

In the circuit diagram above , the ammeter reads a current of 3A when R is 5Ω and 6A when R is 2Ω. Determine the value of x

A. 8Ω
B. 2Ω
C. 10Ω
D. 4Ω

Question 92:

• JAMB 2002

From the diagram above, determine the value of the resistance X

A. 6Ω
B. 9Ω
C. 12Ω
D. 15Ω

Question 93:

• JAMB 2002

An electric iron is rated 1000W, 230V. What is the resistance of its elements?

A. 51.9Ω
B. 52.9Ω
C. 55.9Ω
D. 57.6Ω

Question 94:

• JAMB 2002

an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is

A. 1Ω
B. 2Ω
C. 3Ω
D. 4Ω

Question 95:

• JAMB 2003

I the diagram above, what would happen to the current I, if another resistor, R₂, is connected in parallel to R₁?

A. It will increase because the equivalent resistance will increase
B. It will decrease if R₂ is greater than R₁
C. It will increase because the effective resistance will decrease
D. It will decrease if R₂ is less than R₁