Jamb Physics Past Questions and Answers

Question 2306:

• JAMB 2022

An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

A. 3 days
B. 2 days
C. 1 day
D. 4 days

Question 2307:

• JAMB 2022

The secondary pigments consist of?

A. Blue, green, and violet
B. Yellow, green, and magenta
C. Magenta, yellow, and cyan
D. Red, green, and blue

Question 2308:

• JAMB 2022

A person standing waist-deep in a swimming pool appears to have short legs because of light?

A. Diffraction
B. Refraction
C. Reflection
D. Interference

Question 2309:

• JAMB 2022

A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound

A. 312.0 ms\(^{-1}\)
B. 110.0 ms\(^{-1}\)
C. 343.2 ms\(^{-1}\)
D. 686.4 ms\(^{-1}\)

Question 2310:

• JAMB 2022

When the plate area of a capacitor increases?

A. The voltage can withstand increase
B. The capacitance decreases
C. The capacitance is unaffected
D. The capacitance increases