List of top Physics Questions

The amplitude of a simple harmonic oscillator is \(A\). When the velocity of particle is half of its maximum velocity, then its position is at

If a seconds pendulum on the earth is taken to a planet whose gravity is half of the gravity on earth, its time period on that planet is

An engine delivers \(1000\) watt of power with \(80%\) efficiency. The input power is

At her maximum height a girl in a swing is \(3m\) above the ground and at the lowest point she is \(2m\) above the ground. Her maximum velocity is

A body of mass \(2\) kg changes its velocity from \((3\hat i-4\hat j)\,m/s\) to \((6\hat j+2\hat k)\,m/s\). What is the change in kinetic energy of the body?

The time taken by a body to slide down the smooth inclined plane is \(4\) sec. The time taken by a body to slide \(1/4^{th}\) of the length of the plane is

A block of mass \(m\) is lying on an inclined plane. The coefficient of friction between the plane and the block is \(\mu\). The force required to move the block up the inclined plane will be

A juggler throws ball into air. He throws one whenever the previous one is at its highest point. How high do the balls rise if he throws \(n\) balls each second?

A body starts from rest and travels with uniform acceleration. If the distance covered in first \(2\) seconds is \(x\) and next \(2\) seconds is \(y\), then

If a body released from the top of a tower of height \(H\) meter takes \(T\) seconds to reach the ground, where is the body at time \(T/2\) seconds from the ground?

If a pebble is thrown vertically upwards from the top of a tower with velocity \(5\,m/s\), it strikes the ground after \(3\) seconds. With what velocity the pebble strikes the ground? \((g=10\,m/s^2)\)

The area of rectangle with sides as \(\vec A=3\hat i+4\hat j\) and \(\vec B=\hat i+3\hat j\) is

If \(\vec A+\vec B=\vec C\) and \(A^2+B^2=C^2\), then the angle between vectors \(\vec A\) and \(\vec B\) is

Which pair of physical quantities have same dimensional formula?

If we choose velocity \(V\), length \(L\) and force \(F\) as fundamental physical quantities, then how would you express power in terms of \(V\), \(L\) and \(F\)?

The temperature of water at the bottom of a large waterfall is higher than that of the water at the top, because

1 Newton = ______ dyne

If temperature of warm water is 40°C Celsius and that of warm milk is 95°F Fahrenheit, which one of the following sentences is true?

If 5A current flows through an electric iron, it produces 50J heat in one second, the potential across the electric iron will be

Which waves are used in the device 'SONAR'?

The resistor of resistance \(R\) is connected between the terminals of a cell of emf \(E\) and internal resistance \(r\). The current \(I\) through the circuit is

In an isobaric process of an ideal gas, the ratio of heat supplied and work done by the system $\left(\frac{\text{Q}}{\text{W}}\right)$ is $\left[\frac{\text{C}_{\text{P}}}{\text{C}_{\text{V}}} = \gamma\right]$.

When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit}

Two polaroids are placed in the path of unpolarised beam of intensity ' $\text{I}_0$ ' such that no light is emitted from the second polaroid. If a third polaroid whose polarisation axis makes an angle ' $\theta$ ' with the polarisation axis of first polaroid is placed between these polaroids then the intensity of light emerging from the last polaroid will be}

Two bodies A and B at temperatures ' $\text{T}_1$ ' $\text{K}$ and ' $\text{T}_2$ ' $\text{K}$ respectively have the same dimensions. Their emissivities are in the ratio $16 : 1$. At $\text{T}_1 = x\text{T}_2$, they radiate the same amount of heat per unit area per unit time. The value of $x$ is