Lecturer Physics Test 10 Online Preparation MCQs Past Papers

The gird is moved closer to the cathode without changing anything. The amplification factor of the value will:

What is the cause of mirage in desert areas?

Why danger signals are made red?

Two thin lenses in contact, produce a combined power of +10 dioptress. When they are 0.25 m apart the power reduced to +6 dioptress. The power of the lens in dioptress are:

The temperature co-efficient of resistance of a semi-conductor is:

What is the focal length of a normal eye-lens?

On average, there is no energy transfer in:

When a light ray enters form air into water then its wavelength:

A wave that remains in a constant position is called:

On making gird potential excessively negative, plate resistance (r_p):

When waves go from one place to another, they transport:

Image formed by a concave lens is:

All particles of a wavefront vibrate:

The energy transported by a wave is proportional to the square of the______________ of the wave.

The distance of the eye-lens form the retina is x. For a normal eye, the maximum focal length the eye-lens is:

On which of the following the object size as perceived by eye depends upon?

The ability of a convex lens to produce convergence in a parallel beam is called its:

A mechanical wave is a disturbance that travels through some material or substance called the ____________ for the wave:

Which of the following refers to the distance from crest to crest of a wave?

As the wavelength is increased from violet to red, the luminosity:

The average amount of energy transported by a wave, per unit area per unit time is termed as:

The maximum displacement from the undisturbed position of the medium to the crest top is called:

 In an amplifier maximum voltage gain is obtained when load resistance is equal to:

Why an eye is not able to see objects closer than 25 cm?

Why a glass plate inside a colourless liquid become invisible?