If radius of earth is R then the height ‘h’ at which the value of ‘g’ becomes one-fourth is-
If a force of 20 N is applied to push a 4 kg object, what is the acceleration produced?
In an AC circuit, voltage and current are given by V = 200 sin(ωt) and I = 10 sin(ωt + π/3). What is the average power consumed?
In a refrigerator, the cooling system should always be –
Which law describes the relationship between the force applied to a spring and its extension or compression?
In cricket match, while catching a fast moving ball, a fielder in the ground gradually pulls his hands backwards with the moving ball to reduce the velo...
A car increases its speed from 10 m/s to 30 m/s in 5 seconds. What is its acceleration?
Which instrument is used to measure electric current?
A container is filled with two immiscible liquids of densities ρ₁ = 1000 kg/m³ (height 0.3 m) and ρ₂ = 800 kg/m³ (height 0.2m) stacked above eac...
A train approaches a stationary observer with a speed of 36 km/h. It emits a sound of frequency 500 Hz. If the speed of sound is 340 m/s, what is the ap...
