Physics Quiz by Tasachew Yirga

1. 1. A body is projected vertically upwards with an initial velocity u. If g is the acceleration due to gravity, the time taken by the body to reach its maximum height is:

• • A. u/g

• • B. u/2g

• • C. 2u/g

• D. u/4g

Answer explanation

flight time and time to get hmax

A ray of light passes from air to glass. The refractive index of glass is 1.5. If the angle of incidence is 60 degrees, the angle of refraction is approximately:

• • 45 degrees

• • 35 degrees

• • 50 degrees

• • 60 degrees

A convex lens has a focal length of 10 cm. An object is placed at a distance of 20 cm from the lens. The image formed will be:

• • Real and inverted

• • Virtual and erect

• • Real and erect

• • Virtual and inverted

1. 1. A car travels a distance of 200 km at a speed of 50 km/h. How long does it take to reach the destination?

• • A. 2 hours

• • B. 3 hours

• • C. 4 hours

• • D. 5 hours

Which of the following is a unit of electric current?

• • A. Ohm

• • B. Volt

• • C. Ampere

• • D. Watt