Mass is a _____ quantity. (a) scalar (b) vector (c) tensor (d) None of these
Correct option: (a) scalar Mass is a scalar quantity. The mass of a body is a scalar quantity. The mass has... View Article
Latest Posts
Which of the following is/are not a unit of time?
(a) Second(b) Parsec(c) Year(d) Light yearAmong the given, both Parsec and Light year are not the units of time. They... View Article
A transformer core is laminated to
(a) reduce hysteresis loss(b) reduce eddy current losses(c) reduce copper losses(d) reduce all above lossesCorrect option: (b) reduce eddy current... View Article
kilowatt is the unit of electrical _____ but kilowatt-hour is the unit of electrical _____.
kilowatt is the unit of electrical power but kilowatt-hour is the unit of electrical energy.
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
(a) 2.4 km(b) 2.5 km(c) 3 km(d) 3.6 kmCorrect option: (a) 2.4 kmGiven,Downstream speed = (5 + 1) km/hr =... View Article
1 pascal is equal to ____ N/m2.
1 pascal is equal to 1 N/m2.
What do you mean by refraction of light?
When travelling obliquely from one medium to another, the direction of propagation of light in the second medium changes. This... View Article
The expression for kinetic energy is
(A) (1/3)mv2 (B) (1/2)mv2 (C) (1/2m)v2 (D) (1/2)mv Correct option: (B) (1/2)mv2 The expression for kinetic energy is (1/2)mv2. Here,... View Article
When an oscillator completes 100 oscillations its amplitude reduced to 1/3 of initial value. What will be its amplitude, when it completes 200 oscillations?
(a) 1/8 (b) 2/3 (c) 1/6 (d) 1/9 Correct option: (d) 1/9 Given t = 100 T, a = a0/3... View Article
The type of lens used in a simple microscope are
(a) Binocular lens(b) Plano concave lens(c) Concave convex lens(d) Convex lensCorrect option: (d) Convex lensThe type of lens used in... View Article
1 electron volt is equal to how many Joules?
Electron volt (eV) and Joules are the units of energy in two different systems. However, 1 electron volt is equal... View Article
The power of a lens is 5D. Find its focal length.
Given,Power of lens (P) = +5DAs we know, the power of the lens is the reciprocal of its focal length.So,... View Article
The hotness of an object is determined by its __________.
The hotness of an object is determined by its temperature.
The north pole of a magnet always points towards the ____ when suspended freely.
(a) geographic south(b) geographic north(c) geographic east(d) geographic westCorrect option: (a) geographic southThe north pole of a magnet always points... View Article
Why is tap water a good conductor of electricity?
Tap water a good conductor of electricity since it contains some impurities, i.e. small amounts of sodium, calcium and magnesium... View Article
The value of solar constant is approximately
The value of solar constant is approximately 1.366 kilowatts per square meter (kW/m2) at solam minimum and approximately 0.1% greater,... View Article
Give the meaning of the term vibgyor. With which phenomenon is it connected?
The seven colours of the spectrum of white light is denoted by the term VIBGYOR.Here,V – VioletI – IndigoB –... View Article
Do electromagnetic waves carry energy and momentum?
Yes, the electromagnetic waves carry both energy and momentum.
Why is the convex mirror called as the diverging mirror?
The convex mirror is also called the diverging mirror because this mirror diverges light when they strike its reflecting surface.
“Higher the latitude, lower the temperature” give reason.
Higher the latitude, lower the temperature. The sun’s rays hit at a flatter angle at higher latitudes, so the solar... View Article
