PHYSICS PRACTICE 1

The distance between two successive trough of a wave is 0.4m. if the frequency of the source is 825Hz, calculate the speed of the wave.

• 165m/s   

• 330m/s   

• 412.5m/s   

• 825m/s

A pressurized perfume bottle is left on the window pane of a room. What happens to the gas molecules of the perfume on a sunny day?  They

• expand 

• collides less often 

• move more rapidly 

• contract

Which of the following substances lowers the surface tension of water?  

• metal 

• sand 

• detergent 

• paper

A uniform meter rule is balanced on a meter rule placed at the 35cm mark by suspending mass of 120g at the 10m mark. Calculate the mass of the meter rule 

• 200g 

• 1000g  

• 800g 

• 400g

When the body is thrown vertically upwards. It’s velocity at the maximum height is

• maximum

• zero 

• double its initial value 

• half it’s initial value

Resonance occurs when one vibrating object causes the second object to vibrate at its own natural 

• speed 

• amplitude

• frequency 

• intensity

A body can undergo the following types of motion except

• random 

• rotational 

• translational

• relative

A plane is inclined at angle 0 to the horizontal. It’s velocity ratio is  

• sin 0 

• tan 0 

• 1/sin0 

• 1/tan 0

A rainbow is formed when sunlight is incident on water droplets suspended in the air due to 

• diffraction

• refraction 

• dispersion 

• interference

A converging lens of focal length 10 cm forms an erect image three times the size of a real object and the image 

• 6.6CM 

• 11.1cm 

• 13.3cm 

• 20.0cm