Physics Mcqs | Test For NTS PPSC FPSC, TEST

In optic fiber transmission system _____________ are used regenerate the dim light signal?

Hamad Optical Instruments 29/08/2020

A. Diodes
B. Repeaters
C. Laser
D. Transformer

The work done in the isochoric process is________________?

Hamad Heat and Thermodynamics 28/08/2020

A. constant
B. variable
C. zero
D. depends on situation

The semiconductor diode can be used as a rectifier because _______________?

Hamad Electronics 27/08/2020

A. It has low resistance to the current flow when forward biased & high resistance when reverse biased.
B. It has low resistance to the current flow when forward biased.
C. It has high resistance to the current flow when reverse biased
D. Its conductivity increases with rise of temperature.

An alternating current or voltage_____________________?

Hamad Alternating Current 26/08/2020

A. fluctuates off and on
B. varies in magnitude alone
C. changes its direction again and again
D. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals

Beta particles ionize an atom_________________?

Hamad Nuclear Physics 24/08/2020

A. Due to the electrostatic force of attraction
B. Due to the electrostatic force of repulsion
C. Due to a direct collision
D. Due to the gravitational force