Current Electricity - Jamb Physics Past Questions and Answers

Question 66:

• JAMB 1992

The diagram above shows a meter bridge in which two of thee arms contain resistances R and 2Ω. A balance point is obtained at 60cm from the left end , calculate the value of R

A. 1.2Ω
B. 1.3Ω
C. 3.0Ω
D. 6.0Ω

Question 67:

• JAMB 1993

The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is

A. 0.5 \(\Omega\)
B. 1.0\(\Omega\)
C. 2.0\(\Omega\)
D. 4.0\(\Omega\)

Question 68:

• JAMB 1993

A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is

A. 200C
B. 50C
C. 12C
D. 0.002C

Question 69:

• JAMB 1993

A 40-W instrument has a resistance of 90\(\Omega\). On what voltage should it be operated normally?

A. 60V
B. 150V
C. 225V
D. 3600V

Question 70:

• JAMB 1993

The current I in the fig above is

A. 4.00A
B. 1.30A
C. 0.80A
D. 0.75A