Jamb Physics 1997 Past Questions and Answers

Question 31:

• JAMB 1997

Three electric cells each of e.m.f 1.5V and internal resistance of 1.0\(\Omega\) are connected in parallel across an external resistance of \(\frac{2}{3}\)\(\Omega\). Calculate the value of the current in the resistor

A. 0.5 A
B. 0.9A
C. 1.5A
D. 4.5A

Question 32:

• JAMB 1997

A galvanometer of internal resistance 50\(\Omega\) has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V?

A. 1750\(\Omega\)
B. 1950\(\Omega\)
C. 2000\(\Omega\)
D. 2500\(\Omega\)

Question 33:

• JAMB 1997

If 8 x 10\(^{-2}\) J of work is required to move 100\(\mu\)C of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is

A. 4.0 x 10² v
B. 4.0 x 10⁴ v
C. 8.0 x 10² v
D. 8.0 x 10^-2 v

Question 34:

• JAMB 1997

In a meter bridge experiment, two resistor 2\(\Omega\) and 3\(\Omega\) occupy the left and right gaps respectively. Find the balance point from the left side of the bridge

A. 20cm
B. 40cm
C. 60cm
D. 80cm

Question 35:

• JAMB 1997

Two 50\(\mu\)F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is

A. 5.00 x 10^-5C
B. 2.50 x 10^-3C
C. 1.25 x 10^-3C
D. 1.00 x 10^-2C