POST UTME UNILORIN 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1

A 50 Hz AC voltage is applied to a circuit with a resis\tance of 10 ohm and an inductive reac\tance of 20 ohm. What is the impedance?

A. 10 ohm

B. 20 ohm

C. 30 ohm

D. 40 ohm

Question 2

A 2.5 V battery is connected in series to a 5 ohm resistor and a 10 ohm resistor. What is the current flowing through the 5 ohm resistor?

A. 0.5 A

B. 1 A

C. 1.5 A

D. 2 A

Question 3

A heat engine operates between a temperature of 500 K and 300 K. What is the efficiency?

A. 20%

B. 30%

C. 40%

D. 50%

Question 4

A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. What is the time of flight?

A. 2 s

B. 4 s

C. 6 s

D. 8 s

Question 5

A radioactive sample has a half-life of 5 years. If the initial activity is 1000 Bq, what is the activity after 10 years?

A. 250 Bq

B. 500 Bq

C. 750 Bq

D. 1000 Bq

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