CBSE Class X – Science Physics Exam (Full Syllabus)

The magnetic field lines:

Relative strength of magnetic field at a point in the space adjoining the magnet is shown by the:

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?

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:

A D.C generator works on the theory of:

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

Electrical resistivity of a given metallic wire depends upon:

The instrument used for measuring electric current is:

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is:

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

A student drives out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1 R2 and R3 respectively. Which of the following is huge?

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

The instrument used for measuring electric current is

The device used for detecting and indicating an electric current.

The absorption of light by a molecule depends on the

Arjun 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 ,Name two observations which can be explained by the above phenomenon.

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?

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

When sunlight passes through a canopy of a dense forest, tiny water droplets in the water scatter light.This is an example of

Why is red used as the stopping light at traffic signals?

The sky appears black to an astronaut

The refractive index of glass is largest for