Top 1000+ Solved Physics MCQ Questions Answer
Q. The mass-energy relation is the outcome of –
a. quantum theory
b. general theory of relativity
c. field theory of energy
d. special theory of relativity
Q. Which set of conditions represents the easiest way to liquiify a gas?
a. Low temperature and high pressure
b. High temperature and low pressure
c. Low temperat.ure and low pressure
d. High temperature and high pressure
Q. A person can jump higher on the moon's surface than on the earth because –
a. the moon's surface is rough
b. the acceleration due to gravity in moon is smaller than that on the earth.
c. the moon is cooler than earth
d. the moon has no atmosphere
Q. Rectifiers are used to convert -
a. Direct current to Alternating current
b. Alternating current to Direct current
c. high voltage to low voltage
d. low voltage to high voltage
Q. A dynamo is used to convert –
a. mechanical energy into electrical energy
b. electrical energy into mechanical energy
c. electrical energy into magnetic energy
d. magnetic energy into mechanical energy
Q. Absolute Zero is defined as –
a. The temperature at which all molecular motion ceases
b. At which water boils at 298K
c. At which liquid Helium boils
d. At which the volume becomes zero
Q. When a ring of metal is heated what happens to its hole?
a. expands
b. contracts
c. it expands or contracts according to its diameter
d. it expands or contracts according to its coefficient of expansion
Q. Red is used as an emergency or danger signal as –
a. it is a striking colour
b. its wavelength is the longest
c. it is scattered
d. it has very high energy
Q. The dynamo converts –
a. mechanical energy into electrical energy
b. electrical energy into mechanical energy
c. mechanical energy into magnetic energy
d. magnetic energy into mechanical energy
Q. A small drop of oil spreads over water because :
a. oil has a higher surface tension
b. water has a higher surface tension
c. oil has a higher viscosity
d. water has a higher viscosity
Q. A small gap is left at the joints of rails in a railway track to –
a. avoid the tracks being distorted due to seasonal temperature variation
b. avoid the heating of tracks to high temperature
c. control the speed of train
d. keep the rails equidistant
Q. Which of the following criterion is used for any metal to be used as a cooking material?
a. More specific heat
b. More thermal conductivity
c. Less thermal conductivity
d. Less electrical conductivity
Q. Super conductors are substances that –
a. offer minimum resistance to flow of electric current
b. conduct electricity at low temperature
c. conduct electricity at high temperature
d. offer high resistance to the flow of electric current
Q. Cloudy nights are wanner 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 it toward earth
Q. Kepler's law of planetary motion states that the square of the time period is proportional to the –
a. semi-major axis
b. square of the semi-major axis
c. cube of the semi-major axis
d. fourth power of the serni-major axis