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A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

NETNUST Entry TestPhysicsCircular Motion

Angular displacement $\triangle \theta$ is assigned a ________ sign when the sense of rotation of the body is counter clockwise:

NETNUST Entry TestPhysicsCircular Motion

$\pi$ radians is equal to:

NETNUST Entry TestPhysicsCircular Motion

Angular displacement is a vector quantity for:

NETNUST Entry TestPhysicsCircular Motion

Radiations emitted by human body lie in which of the following series?

NETNUST Entry TestPhysicsAtomic Spectra

In hydrogen spectrum, Lyman and Balmer series belong to which region?

NETNUST Entry TestPhysicsAtomic Spectra

Total energy of an electron in hydrogen atom when it jumps to higher orbit from lower orbit is

NETNUST Entry TestPhysicsAtomic Spectra

Which series is emitted when electron jumps from a higher orbit to fifth orbit?

NETNUST Entry TestPhysicsAtomic Spectra

Laser light is

NETNUST Entry TestPhysicsAtomic Spectra

If an electron undergoes transition from 4th to 2nd orbit, then the color of radiations produced will be

NETNUST Entry TestPhysicsAtomic Spectra

The wavelength of X-rays is

NETNUST Entry TestPhysicsAtomic Spectra

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

NETNUST Entry TestPhysicsAtomic Spectra

Electromagnetic radiations are emitted by the charge:

NETNUST Entry TestPhysicsAtomic Spectra

Braking radiation causes:

NETNUST Entry TestPhysicsAtomic Spectra

The characteristic X-rays appear as:

NETNUST Entry TestPhysicsAtomic Spectra

The holes created in the L and M shells are occupied by transitions of:

NETNUST Entry TestPhysicsAtomic Spectra

Characteristic X-rays are so called because:

NETNUST Entry TestPhysicsAtomic Spectra

$K_{\beta}$ X-ray photon is emitted when the hole in the K shell is occupied by the electron of:

NETNUST Entry TestPhysicsAtomic Spectra

A photon is always emitted when an electron moves from:

NETNUST Entry TestPhysicsAtomic Spectra

$K_{\beta}$ X-rays are actually:

NETNUST Entry TestPhysicsAtomic Spectra

X-ray photons are:

NETNUST Entry TestPhysicsAtomic Spectra

The anode used in the X-ray tube is usually made of:

NETNUST Entry TestPhysicsAtomic Spectra

X-ray tube used for production of X-rays contains:

NETNUST Entry TestPhysicsAtomic Spectra

The study of characteristic X-ray spectra has played an important role in the study of:

NETNUST Entry TestPhysicsAtomic Spectra

The energy difference between first and second orbit of hydrogen atom is:

NETNUST Entry TestPhysicsAtomic Spectra