Jamb Physics 2009 Past Questions and Answers

Question 46:

• JAMB 2009

Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible

A. 12 V
B. 8 V
C. 2 V
D. 36 V

Question 47:

• JAMB 2009

From the diagram above, if the potential difference across the resistor, capacitor and inductor are 80 v, 110 v, 40 v respectively, the effective potential difference is

A. 116.3 V
B. 50.0 V
C. 230.0 V
D. 106.3 V

Question 48:

• JAMB 2009

A binary operation \(\otimes\) defined on the set of integers is such that m \(\otimes\) n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

A. \(\frac{-5}{4}\)
B. \(\frac{-5}{6}\)
C. O
D. 5

Question 49:

• JAMB 2009

A progressive wave is represented by \( y = 10 \text{Sin} (1000\pi t - \frac{\pi x}{34}) \) . two layers of the wave separated by 153cm have a phase difference of

A. 270⁰
B. 45⁰
C. 90⁰
D. 180⁰
E. No Correct Option