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Start learning 50% faster. Sign in nowOccasional pests, a close association with a particular crop is absent and they occur infrequently. Eg: Rice case worm. Persistent pests: Occur on a crop almost throughout the year. Eg: thrips on chilies. Sporadic pests: Occur on a few isolated localities. Eg: coconut slug caterpillar. Epidemic pest: Occur in a severe form in a region or locality at a particular season or time only. Eg: Rice hispa. Endemic pest: Occur regularly and confined mostly to a particular area or locality. Eg: Red hairy caterpillar in groundnut.
A car increases its speed from 10 m/s to 30 m/s in 5 seconds. What is its acceleration?
In a long solenoid of 200 turns/cm carrying a current i, the magnetic field at center is 6.28×10-2 T. If a second solenoid with 100 turns/c...
Which of the following materials behaves as a dielectric?
For CE-transistor amplifier, the audio signal voltage across the collected resistance of 3 k Ω is 3V. Assume the current amplification factor of the t...
Which law states that the ratio of the potential difference across a conductor to the current through it is constant, provided the temperature remains c...
The frequency of ultrasonic waves is:
What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
Two long parallel wires 2 cm apart carry 5 A and 3 A currents in the same direction. What is the force per unit length on one wire?
A body moves with uniform acceleration and covers 80 m in 4 s and 160 m in next 4 s. Find initial velocity.
Which among the following nuclei is more stable based on neutron-to-proton ratio?
