When a beam of white light passes througha glass prism, the colour of lightbeam that deviates the least is:

• Blue

• Red

• Green

• Violet

LIGO stands for:

• Laser Interferometer Gravitational wave Observatory

• Light Interferometer Gravitational wave Observatory

• Light Induced Gravity Observatory

• Laser Induced Gaseous Optics

A fuse wire must be:

• conducting and of low melting point

• conducting and of high melting point

• insulator and of high melting point

• insulator and of low melting point

The frequency of ultrasound waves is

• less than 20 Hz

• between 20 Hz and 2 kHz

• between 2 kHz and 20 kHz

• greater than 20 kHz

The magnetic field strength of a current-carrying wire at a particular distance from the axis of the wire

• depends upon the current in the wire

• depends upon the radius of the wire

• depends upon the temperature of the surroundings

• None of the above

Which one of the following is the correct relation between Å and nm?

• 1nm = 10^-1Å

• 1nm = 10 Å

• 1nm = 1 Å

• 1nm = 10^-2Å

The full form of LED is

• Light Emitting Diode

• Light Emitting Device

• Light Enhancing Device

• Light Enhancing Diode

If a free electron moves through a potential difference of 1 kV, then the energy gained by the electron is given by

• 1.6 x 10^-19 J

• 1.6 x 10^-16 J

• 1 x 10^-19 J

• 1 x 10^-16 J

Which one of the following is the value of the resistance between points A and B in the circuit given above?

• $\frac{2}{5}$R

• ^{$\frac{3}{5}$} R

• _{$\frac{3}{2}$} R

• 4R

The absolute zero temperature is O Kelvin. In °C unit, which one of the following is the absolute zero temperature?

• 0°C

• -100°C

• -273.15°C

• -173.15°C