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JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
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90
Duration
180 mins
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IIT-JEE Main - Previous Year Papers
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90questions
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90questions
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2019 · Physics · Electricity · Current Electricity
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and esistance 5 \(\Omega\). The value of R, to give a potential difference of 5 mV across 10 cm of potentiometer wire, is :
2019 · Chemistry · Physical Chemistry · Surface Chemistry
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
Given
On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal ?
| Gas | H2 | CH4 | CO2 | SO2 |
|---|---|---|---|---|
| Critical
Temperature / K |
33 | 190 | 304 | 630 |
On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal ?
2019 · Mathematics · Algebra · Sequences And Series
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
Let Sk = \({{1 + 2 + 3 + .... + k} \over k}.\) If \(S_1^2 + S_2^2 + .....\, + S_{10}^2 = {5 \over {12}}\)A, then A is equal to :
2019 · Physics · Modern Physics · Communication Systems
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
A 100 V carrier wave is made to vary between 160 V and 40 V by a modulating signal. What is the modulation index ?
2019 · Chemistry · Physical Chemistry · Gaseous State
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressures of the gases for equal number of moles are -
2019 · Mathematics · Algebra · Vector Algebra
JEE MAIN 2019 ONLINE 12TH JANUARY MORNING SLOT
The sum of the distinct real values of \(\mu\), for which the vectors, \(\mu \widehat i + \widehat j + \widehat k,\) \(\widehat i + \mu \widehat j + \widehat k,\) \(\widehat i + \widehat j + \mu \widehat k\) are co-planar, is :