Ram Nam Binu Birthe Jagi Janma - Explanation | Class 10 Hindi | काव्य खंड L1 | L1 Bihar board | BSEB

Maximum heat absorbed during isothermal expansion of an ideal gas from (10 atm, 1 L) to (1 atm, 10 L) is :

In the following ray diagram the positions of an object O, image I and two lenses L_(1) and L_(2) and a mirror M are given. The focal length of L_(1) is 10 cm. Find the focal length of L_(2) .

Statement : The possible number of electrons in a subshell is (4l + 2) . Explanation : The possible number of orientaions of a subshell are (2 l+ 1).

Consider: L_1:2x+3y+p-3=0 L_2:2x+3y+p+3=0 where p is a real number and C : x^2+y^2+6x-10 y+30=0 Statement 1 : If line L_1 is a chord of circle C , then line L_2 is not always a diameter of circle Cdot Statement 2 : If line L_1 is a a diameter of circle C , then line L_2 is not a chord of circle Cdot Both the statement are True and Statement 2 is the correct explanation of Statement 1. Both the statement are True but Statement 2 is not the correct explanation of Statement 1. Statement 1 is True and Statement 2 is False. Statement 1 is False and Statement 2 is True.

Statement 1: If f(x)={x ,\ if\ x\ i s\ irr a t ion a l1-x ,\ if\ x\ i s\ r a t ion a l\ ,\ t h e n(lim)_(x->1//2)f(x) does not exist. Statement 2: x->1/2 can be rational or irrational value. Statement 1 is True: Statement 2 is True; Statement 2 is a correct explanation for statement 1 Statement 1 is true, Statement 2 is true; Statement 2 not a correct explanation for statement 1. Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true

Statement : For n=3,l may be 0,1 and 2, and (m) may be 0 , 0, +- 1, and 0, +- 1 and +- 2 . Explanation : For each value of (n) there are 0 to ( n-1) possible values of l , and for each value of l there are (0) to +- 1 values of (m).

Assertion: The lines x/1=y/2=z/3 and (x-1)/(-2)=(y-2)/(-4)=(z-3)/(-6) are parallel., Reason: two lines having direction ratios l_1,m_1,n_1 and l_2,m_2,n_2 are parallel if l_1/l_2=m_1/m_2=n_1/n_2 . (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true R is not te correct explanation of A (C) A is true but R is false. (D) A is false but R is true.

Assertion: Straighat lines l_1 and l_2 are perpendicular to each other. Reason: aa\'+bb\'+cc\'=sintheta (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true R is not te correct explanation of A (C) A is true but R is false. (D) A is false but R is true.

CBSE Class 10 Social Science - Most Important MCQs - Live Discussion | Part - 1 | CBSE Board 2020