Practice Physics practice test 5 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) The maximum kinetic energy of a planet moving around the sun is at a position
(a)
(b)
(c)
(d)
Q-2) Two identical particles move towards each other with velocity 2v and v respectively. The velocity of centre of mass is
(a)
(b)
(c)
(d)
Q-3) Which one of the following physical quantities is represented by the shaded area in the given graph?
(a)
(b)
(c)
(d)
Q-4) Watt–hour meter measures
(a)
(b)
(c)
(d)
W – hr is a unit of energy.
Q-5) SI unit of pressure is
(a)
(b)
(c)
(d)
1 pascal = 1 N / m2.
Q-6) An electrical appliance of 500 W is used for 5 hours per day. Energy consumed in 30 days will be
(a)
(b)
(c)
(d)
Q-7) Consider the following statements :
- Copernicus discovered that the earth moves around the sun.
- An astronaut cannot use a straw to sip a drink on the surface of the moon.
- The S.I. unit of weight is kilogram.
Which of these statements is/are correct?
(a)
(b)
(c)
(d)
The weight of an object is the force on the object due to gravity.
The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton.
Q-8) Consider the following statements : - A body can have constant velocity and still have varying speed.
- A body falls freely from a height with uniform acceleration.
Which of these statements is/are correct ?
(a)
(b)
(c)
(d)
Earth is not uniform and also rotating, so the free fall acceleration g on the earth differs slightly from the gravitational acceleration ag.
Q-9) Consider the following features of newer models of motor cars:
- Radial tyres
- Streamlined body
- Multipoint fuel injection
- Catalytic converter with exhaust
Which of these features make the new models of motor cars more fuel efficient?
(a)
(b)
(c)
(d)
A “streamlined” design is one in which objects that move through a gas or liquid are shaped to match these lines, and therefore, reduce the energy required to produce that motion.
Multi-point fuel injection system injects fuel into individual cylinders, based on commands from the ‘onboard engine management system computer—popularly known as the Engine Control Unit/ECU.
These techniques result not only in better ‘power balance’ amongst the cylinders but also in higher output from each one of them, along with faster throttle response. The other two options radial tyres and catalytic converter with exhaust do not contribute to making the car more fuel efficient.
Q-10) In wind power, which form of energy is converted into electrical energy?
(a)
(b)
(c)
(d)