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Which of the following is/are not correct about a magnet?

What do you mean by multiple motions? Explain it with an example. [3 MARKS]

Give a reason why Solids and liquid co-exist at their melting points.

To use a Spring-balance we have to ensure________.

When we are exposed to sun wearing a dark coloured dress, we feel:

According to the following graph, which of the vehicles A, B and C is moving the slowest?

If the shear stress in steel exceeds $4.00\times {10}^{8}N/m^2$ , the steel ruptures. The shearing force required to punch a $1cm$ diameter hole in a steel plate $0.5cm$ thick will be

Air moves faster between two places when the pressure difference between the places is __________.

When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces to 0.01 %. the bulk modulus of the material of the rubber in $dynes/c{m}^2$ is

The direction of magnetic field lines is taken as:

In the push button switch, ___

Which of these has virtual focus?

The trapped air between woollen clothes _______ .

The thermal conductivity of a rod depends on

Sound is produced because of _______ of a body.

An electron has a constant acceleration of $3.2m/s^2$. At a certain instant its velocity is $9.6m/s$. What is its velocity $2.5$ second earlier.

Which of the given vector is a negative vector?

In the symbol of the electric cell, the longer line represents the _____________.

Why can't we see a candle flame through a bent hollow pipe?

A block of mass 5 kg is sliding on a smooth floor with a velocity of 20 m/s. The amount of work required to stop it is ___ .

A particle is moving from point A to point B and covers the entire distance of 10 km in just 2 minutes. What would be the speed at which the particle was traveling?

Difference between electromagnet and permanent magnet

A convex mirror is used as a rear view mirror in vehicles because___.

The magnetic effect of the electric current was first observed by ___.

Define gravitational force quantitatively.

If the masses of two bodies are $m$ and $M$, and the distance between them is $r$.

___ on a body is changing its state from rest to movement. It is said to be the ___ possessed by the body.

What is Absolute Zero? In which scales is it used

If a magnet is placed on a plastic plate with pins spread on it, then________.

How does a digital thermometer work.

Does convection takes place in solids? Why

A spinning top is an example for:

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Choose the correct statement(s) about a plane mirror periscope.

What will happen if we drill a hole at the top of the glass tube containing mercury column in a barometer?

'X' is a device which prevents damages to electrical circuits and possible fires. Identify 'X':

What colour of light is obtained when we mix beams of lights of all colour?

A hole is drilled from the surface of earth to its centre. A particle is dropped from rest at the surface of earth. The speed of the particle when it reaches the centre of the earth in terms of its escape velocity on the surface of earth $v_e$ is

Three rods made of the same material and having the same cross-section have been joined as shown in figure. Each rod is of the same length. The left and right ends are kept at $0^{\circ }Cand{90}^{\circ }C$ respectively. the temperature of the junction of the three rods will be.

Neap tides occur when earth, sun and moon forms an angle of __.

A running athlete possesses___

A bird flying in the air experiences ___ pressure over its head.

Select the correct statement among the following?

Light rays undergo ______ as they pass from air to water.

Electricity is a phenomenon which has the capacity to store __.

Which of the following is/are true about a mechanical wave?

A man weighs 600 N on the equator, but when he moves to the pole he finds a slight increase in his weight. This is because: