AIIMS 2017

What will be the a vs x graph for the following graph?

Charges \(+q\) and \(-q\) are placed at points \(A\) and \(B\) respectively which are a distance \(2 L\) apart, \(C\) is the mid-point between \(A\) and \(B\). The work done in moving a charge \(+Q\) along the semicircle \(C R D\) is

In the given figure, the angle of reflection is

Assertion : A beam of charged particles is employed in the treatment of cancer.

Reason : Charged particles on passing through a material medium lose their energy by causing ionization of the atoms along their path.

In an experiment to measure the height of a bridge by dropping stone into water underneath. If the error in measurement of time is \(0.2 \mathrm{~s}\) at the end of \(4 \mathrm{~s}\), then the error in estimation of height of bridge will be (neglect the water resistance, i.e. thrust)

Assertion : The electric field due to a dipole on its axis line at a distance \(r\) is \(E\). Then, electric field due to the same dipole on the equatorial line and at the same distance will be \(E / 2\).

Reason : Electric field due to dipole varies inversely as the square of the distance.