List of practice Questions

If the measured values of the voltage across and the current through a resistor are \((100 \pm 5)\,V\) and \((10 \pm 0.2)\,A\) respectively, then the error in the determination of the resistance is:

If a body is thrown vertically upwards from the ground with a velocity of 20 m/s, then its displacement during the last second of upward motion is (Acceleration due to gravity \(g=10\,m/s^2\)):

If a ball released from a height \(H\) takes a time \(T\) to reach the ground, then the position of the ball from the ground at a time \(\frac{T}{2}\) is:

For a particle moving in x-y plane, if at any instant of time ‘t’ (in second) its displacements (in metre) are \(x=2t^{2}-t\) and \(y=4t^{2}-4t\), then the velocity of the particle at a time \(t=1\,s\) is:

A body of mass 6 kg is moved with uniform speed on a rough horizontal surface through a distance of 200 cm. If the coefficient of kinetic friction between the surface and the body is 0.1, then the work done against friction is (Acceleration due to gravity \(g = 10\, m/s^2\)):

If the time taken for a block to slide down a smooth inclined plane of angle of inclination $30^\circ$ is 4 s, then the time taken by the block to slide down a rough inclined plane of the same length and same angle of inclination is
(The coefficient of kinetic friction between the inclined plane and the block = $0.28/\sqrt{3}$)

Study the following and identify the correct option.
Statement I: The juxtaglomerular cells release renin in response to decreased blood pressure.
Statement II: Renin directly acts on distal convoluted tubule, leading to increased blood pressure.

Neurilemma around axon of a neuron is formed by:

Find the mismatched pair:

Which of the following is not an alien species in India?

Assertion (A): Arthropods are schizocoelomates
Reason (R): Coelom in arthropods is formed by splitting of mesoderm

Which of the following is not a biosafety concern for GM crops?

Identify the wrongly matched one:

Choose the incorrect statement:

Enzymes that remove nucleotides from ends and make specific cuts:

Choose the correct statements: ABA plays an important role in stratification Decapitation results in growth of lateral buds Kinetin naturally occurs in plants Vernalization promotes flowering by high temperature

Based on ICTV system, AIDS virus belongs to the genus:

One acre of trees annually absorbs CO$_2$ equal to that produced by driving 26000 miles. How many people’s oxygen needs for a year does this cover?

Assertion (A): Transport of plant growth regulators is strictly polarized and unidirectional.
Reason (R): Organic and mineral nutrients undergo multi-directional transport.

In India, the Chairperson of the Permanent House is

UNICEF stands for