Physics Past Questions And Answers
Which of the following pairs of light rays show the widest separation in the spectrum of white light
- A. Blue and red
- B. Green and yellow
- C. Indigo and violet
- D. Orange and red
The parts of a bar magnet at which the magnetic effect is strongest are called the
- A. poles
- B. neutral points
- C. magnetic declinations
- D. magnetic meridians
Which of the following electromagnetic waves has the highest frequency?
- A) utra - violet rays
- B) radio waves
- C) x - rays
- D) infrared - rays
Which of the following is obtained when a magenta is mixed with green colour?
- A. Yellow
- B. Blue
- C. White
- D. Red
The saturation vapour of a liquid depends on its
- A. volume
- B. temperature
- C. mass
- D. density
When an elastic material is stretched by a force, the energy stored in it is
- A. kinetic
- B. potential
- C. thermal
- D. electrical
What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?
- A. 100N
- B. 90N
- C. 80N
- D. 120N
Lenz's law is a law of conservation of
- A) electric charge
- B) electric current
- C) Energy
- D) Momentum
A real image of an object fom1ed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?
- A. 30cm
- B. 25cm
- C. 20cm
- D. 15cm
A parallel plate capacitor of capacitance 600\(\mu F\) has a potential difference of 200V between its plates. Calculate the charge on either plate of the capacitor
- A. 1.2C
- B. 3.3C
- C. 3330.0C
- D. 12.0000.0C