Physics 2020 Jamb Past Questions and Answers

Question 11 :

• JAMB 2020

If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?

A. Doppler effect
B. Resonance
C. Ultra sound
D. Rarefaction

Question 12 :

• JAMB 2020

Which of the following can be described as high tension transmission?

A. High resistance and low voltage
B. Low current and high voltage
C. High current and low voltage
D. High current and low resistance

Question 13 :

• JAMB 2020

What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

A. N0.65
B. N0.39
C. N3.90
D. N0.13

Question 14 :

• JAMB 2020

The mass of a proton is approximately equal to that of

A. An \(\alpha\)-particle
B. A \(\beta\)-Particle
C. A neutron
D. An electron

Question 15 :

• JAMB 2020

A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is

A. 5 volts
B. 10 volts
C. 15 volts
D. 20 volts