The energy released during burning of coal, oil, etc. is called
The energy released during the burning of coal, oil is called heat energy. Along with heat energy, light energy is... View Article
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A body at rest cannot have:
A) Momentum B) Kinetic energy C) Both A) and B) D) Equilibrium The correct option is C) Both A) and... View Article
If the speed of an object doubles, its kinetic energy becomes
KE =1/2mv2 If v becomes 2v, then KE = ½m(2v)2 = 4×½mv2 = 4 times initial KE
What is Boiling Point?
The temperature at which the vapour pressure of a liquid equals the atmospheric pressure is known as boiling point. At... View Article
In a battery_____________________
Answer: In a battery chemical energy is converted to electric energy. When a bulb is connected to a battery, the... View Article
Which of the following is not an example of potential energy? (a) A vibrating pendulum at its maximum displacement from its mean position (b) A body at rest from some height from the ground (c) A wound clock spring (d) A vibrating pendulum when it is just passing through its mean position
Among the given options (d) is the answer A vibrating pendulum when it is just passing through its mean position... View Article
A magnetic field existing around a magnet can be represented by magnetic field lines. Magnetic field lines always form:
Magnetic field lines always form closed loops around a magnet.
The attractive property of a magnet is maximum at
The attractive property of a magnet is maximum at north and south poles both.
Determine the specific latent heat
2000 J of heat is required to melt 40 Kg of substance, then the specific latent heat of a substance... View Article
Which among these is not true for magnets?
A) When a bar magnet is cut into half, each half will have only one pole B) A magnet can... View Article
A conducting loop having a capacitor is moving outward from the magnetic field then which plate of the capacitor will be positive
Crosses (X) linked with the loop are decreasing, so induced current in it is clockwise i.e. from B → A. Hence electrons flow from plate A to B so... View Article
A current through a horizontal power line flows in the east to west direction. The direction of the magnetic field at a point directly below it is from ____.
Answer: A current through a horizontal power line flows in the east to west direction. The direction of the magnetic... View Article
If a charged particle does not experience any force in a magnetic field, then…
If a charged particle does not experience any force in a magnetic field, then it is either stationary or moving... View Article
A vertical wire carries a current straight down. To the east of this wire, the magnetic field points:
A: eastwards B: downwards C: southwards D: northwards Use the right-hand rule. Point your thumb down. Your fingers curl toward... View Article
The current which changes direction after equal interval of time is known as
The current which changes direction after equal interval of time is known as AC (alternating current)
Which among these is a wrong statement?
Wider walls exert less pressure as area is more.
What is the normal blood pressure
Our blood pressure is equal to the atmospheric pressure which is 1,00,000 Pa.
As we go higher into the atmosphere
the density of air gradually increases The density of air gradually decreases as one goes up into the atmosphere.
Which consequence is due to high specific latent heat of ice
All the consequences are due to high specific latent heat of ice.
Two like magnetic poles
Two like magnetic poles repel each other. The two ends of the magnet are known as poles. One end is... View Article
