Physics Test - ...

A radio transmitter operates at a frequency 880 kHz and a power of 10 kW . The number of photons emitted per second is:

If a body is rolling down from a hill at certain height, the body will have:

A geyser heats water flowing at the rate of 3.0 litres per minute from 27^∘ C to 77^∘ C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 × 10⁴ J/g?

According to Gauss’s law, if E is _________, the charge density in the ideal conductor is zero.

What is the direction of force of friction acting on a body moving on a fixed surface?

What amount of heat must be supplied to 2.0 × 10⁻²kg of Nitrogen (at room temperature) to raise its temperature by 45^∘C at constant pressure? (Molecular mass of N₂ = 28; R = 8.3Jmol⁻¹K⁻¹.

Which of the following is Kilowatt-hour a unit of?

When two vectors in the same direction are added, the magnitude of the resulting vector is equal to _______.

Select the correct statement regarding plane mirror:

A long insulated copper wire is closely wound as a spiral of 'N' turns. The spiral has an inner radius 'a' and an outer radius 'b'. The spiral lies in the X-Y plane and a steady current 'I' flows through the wire. The Z-component of the magnetic field at the center of the spiral is: