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A wire carrying current $I$ has the shape as shown in the adjoining figure. Linear parts of the wire are very long and parallel to the X-axis while the semicircular portion of radius $R$ is lying in the Y-Z plane. The magnetic field at point $O$ is:
Coconut milk factor is:
Given below are some statements about plant growth regulators. Which of the following is incorrect?
Cell elongation in internodal regions of the green plants takes place due to:
Who coined the term 'Kinetin'?
Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
An electron moving in a circular orbit of radius $r$ makes $n$ rotations per second. The magnetic field produced at the centre has magnitude:
The major organic product in the reaction, $CH_3 — O — CH(CH_3)_2 + HI \rightarrow \text{Product}$ is:
Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in plants?
Which hormone promotes internode / petiole elongation in deep water rice?
The gaseous plant growth regulator is used in plants to:
One of the synthetic auxin is:
Bundle of His' is a part of which one of the following organs in humans?
A uniform conducting wire of length $12a$ and resistance $R$ is wound up as a current-carrying coil in the shape of: (i) an equilateral triangle of side $a$ (ii) a square of side $a$ The magnetic dipole moments of the coil in each case respectively are:
Effect of light and dark rhythm on plants is known as:
Formation of interfascicular cambium from fully developed parenchyma cells is an example of
Calcium is important in skeletal muscle contraction because it:
The characteristics and an example of a synovial joint in humans are:
The pivot joint between atlas and axis is a type of:
A block of mass $M=5 \text{ kg}$ is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force $F=40 \text{ N}$ is applied, the acceleration of the block will be: ($g=10 \text{ m/s}^2$)