Physics Past Questions and Answers

A uniform light beam XZ is Hinged at X and kept in equilibrium by the forces T and F as shown in the diagram above. if XO = 20m and OY = 30cm, express T in terms of F

A T =2âˆš3/3
B T= 2F
C T = 5V3F/3
D T = 5F

Question 47:

For a rough inclined plane on which lies a body of weight W, the angle Î¸ in the diagram above becomes the angle of friction if

A Tan Î¸ = coefficient of static friction
B Cos θ = coefficient of dynamic friction
C Sin Î¸ = coefficient of sliding friction
D Sec Î¸ = limiting frictional force

Question 48:

The diagram above shows two wave forms P and Q at a particular instant in time. the two waves will interface

A Destructively to produce a wave of larger amplitude
B Destructively to produce a wave of smaller amplitude
C Constructively to produce a wave of larger amplitude
D Constructively to produce a wave of smaller amplitude

Question 49:

When the sun, moon and the earth are as shown in the diagram above an observer standing in X is in

A Penumbra and sees a partial eclipse
B Penumbra and sees a total eclipse
C Umbra and sees a partial eclipse
D Umbra and sees a total eclipse