The resistance of the tungsten wire in the light bulb, which is 120 V / 75 W and powered by a 120 V direct current supply, is

A comet orbits around the Sun in an elliptical orbit. Which of the following quantities remains constant during the course of its motion ?

Initially a beaker has 100 g of water at temperature 90°C. Later another 600 g of water at temperature 20°C was poured in to the beaker. The temperature, T of the water after mixing is

If copper and silicon pieces are heated, the resistance of

A uniform rod of length of 1 m and mass of 2 kg is attached to a side support at O as shown in the figure. The rod is at equilibrium due to upward force T acting at P. Assume the acceleration due to gravity as 10 m/s² . The value of T is

Huygens’ wave theory of light cannot explain

Wavelength of the wave with 30 MHz frequency is

Uncertainty principle is valid for

A gas will approach ideal behavior at

The inert gas found most abundant in the atmosphere is

The volume of oxygen liberated at STP from 15 mL of 20 volume H₂O₂ is

Name of the following reaction is

Protein is a polymer made of

sin 765° is equal to

The 30th term of the arithmetic progression 10, 7, 4 is

The solution of 3^{2x - 1} = 81^{1 - x} is

The minimum value of the function max (x, x²) is equal to

The equation 5x² + y² + y = 8 represents