Post Utme Physics Past Questions and Answers

Question 451:

Which of the following statements is true ____________
of gamma-rays?

A. They are deflected by electric field
B. They ionize intensely
C. They carry no electric charge
D. They originate outside the nucleus of the atom

Question 452:

The virtual image formed of an object placed 10 cm from a convex lens is 2.
Find the focal length of the lens ____________

A. 7.5 cm
B. 15 cm
C. 30 cm
D. 10 cm

Question 453:

A millimeter of resistance 2.5 and full scale deflection of 50 mA is to be used to measure a potential difference of 50 V.
What is the resistance of the multiplier?

A. 99.75
B. 997.5
C. 9975
D. 9.98

Question 454:

The ice and steam points of a mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3 cm and 23 cm lengths of the mercury thread. What is the temperature when the length of the mercury thread is 12 cm?

A. 400C
B. 600C
C. 750C
D. 450C

Question 455:

When a ray of light passes from glass to air, it is ____________

A. Bent towards the normal
B. Away from the normal
C. Not deviated
D. Spread out in a pure spectrum