CBSE Class X – Science Physics Exam (Full Syllabus)

The nature of magnetic field line passing through the centre of current carrying circular loop is:

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

The name of the effect being produced by the moving magnet

To determine the direction of force experienced by a current carrying conductor placed in a uniform magnetic feld.

The change in magnetic feld lines in a coil is the cause of induced electric current in it. Name the underlying phenomenon.

The phenomenon discovered by Faraday.

The law states that if the forefinger indicates the direction of the magnetic field and thumb shows the direction of motion of conductor, then the middle finger will show the direction of induced current

Two magnetic feld lines never intersect because the resultant force on a north pole at any point can only be in

A fuse wire frequently gets burnt when used with a good heater. It is advised to use a fuse wire of

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly

Ohm’s law express that:

The condition for the credibility of Ohm’s law is that the

Electrical resistivity of a given metallic wire depends upon:

The formula which states the relation between potential diference, current and resistance

The ammeter is always connected in series because

S.I unit of resistivity

The device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential diference across a resistor

At noon, the Sun looks white as:

What would have been the colour of sky if the earth had no atmosphere

When a fine beam of sunlight enters a smoke filled room, smoke particles become visible due to scattering of light by these particles

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

The defect the eye cannot focus objects both horizontally and vertically at the same time

A concave lens of short focal length has greater

The SI unit of Power of a lens is

The emergent ray in a prism bend at an angle to the direction of the