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JEE Main Mock 100

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Question 1

If 1, ω, ω² are the cube roots of unity, then
Δ =

is equal to

Question 2

If the roots of the equation ax² + x + b = 0 be real and different, then the roots of the equation x² – 4

x + 1 = 0 will be-

Question 3

If A, B and C are the angles of a triangle, then

Question 4

The number of positive integers satisfying the inequality ⁿ⁺¹C_{n – 2} – ⁿ⁺¹C_{n – 1}≤ 100 is-

Question 5

In an ac circuit, the current is given by i = 4 sin (100πt + 30 º) ampere. The current becomes maximum first time (after t = 0) at t equal to –

Question 6

A closed coil consists of 500 turns on a rectangular frame of area 4.0 cm² and has a resistance of 50 ohm. The coil is kept with its plane perpendicular to a uniform magnetic field of 0.2 weber/meter². The amount of charge flowing through the coil if it is turned over (rotated through 180 º) will be-

Question 7

A full wave rectifier circuit is operating from a 50 Hz source frequency, then the frequency obtain in ripple action will be

Question 8

In the circuit shown, the resistance are given in ohms and the battery is assumed ideal with emf equal to 3.0 volts. The resistor that dissipates the most power is -

Question 9

In piperidine,

N -atom has hybridization -

Question 10

In which of the following have higher difference in the value of II^nd and III^rd I.P. -

Question 11

Atomic hydrogen is obtained by passing ordinary hydrogen through -

Question 12

Which one of the following methods is used to prepare borax crystals?

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Oct 22JEE & BITSAT