Physics

The force which keeps a body moving in a circular path is called:

The center of gravity of a triangular lamina (triangle) is at the point of intersection of its:

A force $F$ acts on a body and displaces it by a distance $s$ at an angle $\theta$ to the force. The work done $W$ is:

The angle of refraction for a ray passing from air to glass is $30^\circ$. If the refractive index of glass is $1.5$, what is $\sin i$?

If the refractive index of a medium is $1.0$, it means light travels:

Which of the following materials has the highest refractive index?

In a convex lens, when the object is placed between $F$ and $2F$, the image is formed:

If two lenses of power $P_1$ and $P_2$ are placed in contact, the total power $P$ of the combination is:

A lens has two spherical surfaces. The line joining the centers of curvature of these surfaces is called the:

Which scientist discovered infrared radiation by using a thermometer?

Electromagnetic waves are ________ in nature.

Which radiation is used for taking photographs in the dark or in smoky conditions?

Sound waves cannot be polarized because they are:

The maximum displacement of a vibrating particle from its mean position is:

The ratio of the speed of sound in air to the speed of sound in water is:

One Ampere of current is defined as the flow of:

The potential difference across the neutral wire in a standard Indian household supply is ideally:

Which component is used to prevent an electric shock if the metallic body of an appliance becomes live?

Low power appliances like bulbs and fans are usually connected to which circuit rating?

Which pin of a 3-pin plug makes contact with the socket first during insertion?

Under normal operating conditions, the current flowing through the Live wire and the Neutral wire of an appliance is:

Which of the following is an application of an electromagnet?

In the Right-Hand Thumb Rule, the curled fingers indicate the direction of:

Magnetic field lines inside a bar magnet travel from:

The process of a solid directly changing into gas without passing through the liquid state is:

A substance $A$ has a specific heat capacity of $400 \text{ J kg}^{-1} \text{ K}^{-1}$ and substance $B$ has $900 \text{ J kg}^{-1} \text{ K}^{-1}$. For the same mass and same heat input:

Ice at $0^{\circ}\text{C}$ is more effective in cooling a drink than water at $0^{\circ}\text{C}$ because:

In the context of radioactivity, background radiation is present:

Where should radioactive waste ideally be disposed of?

A substance that spontaneously emits radiations is said to be: