BSEK Karachi Physics Class 10 Past Paper 2025

The two factors affecting the speed of sound in air are:

The power of the lens of focal length 1 cm will be:

If two capacitors each of 4 μF capacitance connected in series their equivalent capacitance will be:

A wire has a resistance of 5 Ω and 2A current passes through it then the voltage across the wire ends will be:

A device which converts mechanical energy into electrical energy is called:

An example of digital electronic device is:

This is not a component of CBIS:

The number of neutron(s) in Deuterium is/are:

The nuclear radiation which has the highest penetrating ability is:

These cannot carry electric charge:

The type of electromagnetic wave used in security scanners at night is:

The oscillatory motion is damped due to the presence of: