Physics MCQs for Class 9 with Answers
1 MJ=
103 J
106J
107J
10-3J
The product of force and distance is :
Force
Work
Torque
Nil
If W stands for work, F stands for force and S stand for displacement, than mathematical work is defined as
W = P x S
W = F x v
W = F x r
W = F x S
Work is done when force displace inits own _____________
Way
Method
Direction
None
The work done will be zero when the angle between the force and the displacement is:
45°
60°
90°
180°
A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?
5 Joules
86xa0Joules
707xa0Joules
866xa0Joules
_____________ is an other unit of power.
J
W
hp
W/J
The energy stored in coal is
Heat Energy
Kinetic energy
Chemical energy
Nuclear energy
The ratio of useful output to input energy is called:
Power
Energy
Efficiency
Horse power
Which one of the following converts light energy into electrical energy?
Electric Bulb
Electric generator
Photocell
Electric cell
Continue Reading Go to Next Page