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In this website each webpage contains minimum 10 mcqs and maximum upto 30 mcqs (objective type questions), one liner questions etc.
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Physics MCQs | Objective Type Questions SET-29
Q1. Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?
(a) The heavier mass will reach greater height
(b) The lighter mass will reach greater height
(c) Both will reach the same height
(d) Any of them may reach great height
Ans. : (c) Both will reach the same height
Q2. The unit of electrical power is
(a) Bolt
(b) Watt
(c) Kilowatt hour
(d) Ampere
Ans. : (a) Bolt
Q3. The scientist who first sent electromagnetic waves to distant places is
(a) James Clerk Maxwell
(b) Heinrich Hertz
(c) Thomas Alva Edison
(d) John Logie Baird
Ans. : (c) Thomas Alva Edison
Q4. The centre of gravity of a sprinter during the race lies
(a) ahead of his feet
(b) behind his feet
(c) at the centre of the body
(d) to the left side of the body
Ans. : (a) ahead of his feet
Q5. loudy nights warmer compared nights because clouds mainly
(a) absorb heat from the atmosphere send it towards earth
(b) prevent cold waves from the sky descending on earth
(c) reflect back the heat given by earth
(d) produce heat and radiate toward earth
Ans. : (c) reflect back the heat given by earth
Q6. A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?
(a) Increase
(b) Decrease
(c) Remain constant
(d) Will increase first and then decrease
Ans. : (a) Increase
Q7. The period of revolution of a geo stationary satellite is
(a) 365 days
(b) 30 days
(c) 24 hours
(d) changing continuously
Ans. : (c) 24 hours
Q8. A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously?
(a) They must have the same volume
(b) They must have the same density
(c) They must have the same mass
(d) They must be dropped in vacuum
Ans. : (d) They must be dropped in vacuum
Q9. The frequency of ultrasound wave is typically
(a) Above 20 kHz
(b) Above 20000 kHz
(c) Below 20 kHz
(d) Below 02 kHz
Ans. : (c) Below 20 kHz
Q10. Which type of reaction produces the most harmful radiation ?
(a) Fusion reaction
(b) Fission reaction
(c) Chemical reaction
(d) Photo Chemical reaction
Ans. : (b) Fission reaction
