CBSE Class X – Science Physics Exam (Full Syllabus)

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along:

By which instrument, the presence of magnetic field be resolved?

When current is parallel to magnetic field, then force experience by the current carrying conductor placed in uniform magnetic field is

Which of the following component influence the strength of force experience by a current carrying conduct in a uniform magnetic field?

The name of the effect being produced by the moving magnet

A coil of many circular turns of wire wrapped in the shape of a cylinder

A device that can convert electrical energy into mechanical energy is

You are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic feld lines around the wire.explain

Electrical resistivity of a given metallic wire depends upon:

A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:

The resistivity does not change if:

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

The ammeter is always connected in series because

S.I unit of resistance

S.I unit of resistivity

Joule’s law of heating implies that heat produced in a resistor is directly proportional to the square of

When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is

The red colour of the sun at the time of sunrise and sunset is because:

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

Arpit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed ,What is the total time diference on duration of day on earth?

Effect produced by scattering of light by the atmosphere.

The effect seen Color of the sky during Sunrise and Sunset

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

Astigmatism can be corrected

The colour of scattered light depends on the