Physics

Time period of a simple pendulum in a stationary lift is 'T'. If the lift accelerated with $\frac{g}{6}$ vertically upwards then the time period will be:

(Where g = acceleration due to gravity)

The dimension of mutual inductance is:

The efficiency of a Carnot's engine, working between stem point and ice point, will be

The variation of acceleration due to gravity (g) with distance (r) from the centre of the earth is correctly represented by: (Given R = radius of earth)

The variation of acceleration due to gravity (g) with distance (r) from the centre of the earth is correctly represented by: (Given R = radius of earth)

A thin circular ring of mass M and radius R is rotating with a constant angular velocity 2 rads^-1 in a horizontal plane about an axis vertical to its plane and passing through the centre of the ring. If two objects each of mass m be attached gently to the opposite ends of a diameter of ring, the will then rotate with an angular velocity (in rads^-1).

An object is thrown vertically upwards. At its maximum height, which of the following quantity becomes zero?

A person is standing in an elevator. In which situation, he experiences weight loss?

An expression for a dimensionless quantity P is given by $P=\frac{\alpha }{\beta }lo{g}_e\left(\frac{kt}{\beta t}\right);$ where α and β are constants, x is distance; k is Boltzmann constant and t is the temperature. Then the dimensions of will be

Production of iron in blast furnace follows the following equation

$F{e}_3{O}_4\left(s\right)+4CO\left(g\right)\to 3Fe\left(I\right)+4C{O}_2\left(g\right)$

When 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is:

[Given : Molar Atomic mass (g mo^-1); Fe = 56

 Molar Atomic mass (g mol^-1); O = 16

Molar Atomic mass (g mol^-1); C = 12]