Time Left - 01:00:00 mins
JEE 2020: Weekly Quiz 5 (29.06.2019)
Attempt now to get your rank among 178 students!
Question 1
The total current supplied to the circuit by the battery is
Question 2
Which of the following statements is false?
Question 3
An ideal coil of 10H is connected in series with a resistance of 5Ω and a battery of 5 V. 2 seconds after the connection is made, the current flowing in amperes in the circuit is
Question 4
The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its stand and cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5 Ω. If the balance point is obtained at λ =30 cm from the positive end, the e.m.f. of the battery is
Question 5
Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R1 and R2 (R2 > R1). If the potential difference across the source having internal resistance R2 is zero, then
Question 6
Two conductors have the same resistance a 0 ºC but their temperature coefficients of resistance are α1 and α2. The respectively temperature coefficients of their series an parallel combinations are nearly
Question 7
The resistance of bulb filament is 100 Ω at a temperature of 100 ºC. If its temperature coefficient of resistance be 0.005 per ºC, its resistance will become 200 Ω at a temperature of
Question 8
A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will
Question 9
On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is How much was the resistance on the left slot before interchanging the resistances?
Question 10
Two batteries with e.m.f. 12 V and 13 V are connected in parallel across a load resistor of The internal resistances of the two batteries are and respectively. The voltage across the load lies between :
Question 11
Question 12
Find
Question 13
Question 14
Find If
Question 15
Find the number of possible values of and if they are positive integers.
Question 16
The range of the function defined on is
Question 17
Let be a differentiable function such that and for some a < b. Then the minimum number of roots of in the interval (a, b) is
Question 18
If 3f(x) - for x > 0, then f(ex) is
Question 19
Let [a] denote the greatest integer which is less than or equal to a. Then the value of the integral dx is
Question 20
The domain of the function y = is
Question 21
Rate of diffusion of ozonized oxygen is times that of pure oxygen. What is the percent degree of association of oxygen assuming pure O2 in the sample initially ?
Question 22
Regarding the ethanoic acid-sodium ethanoate buffer, which of the following statement is correct?
Question 23
The hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is :
Question 24
Which of the following statements is correct for a reversible process in a state of equilibrium?
Question 25
The equilibrium constant of the reaction :
Cu(s) + 2Ag+ (aq) → Cu2+(aq)+2Ag(s);
E0=0.46 V at 298 K is :(log2= 0.30)
Cu(s) + 2Ag+ (aq) → Cu2+(aq)+2Ag(s);
E0=0.46 V at 298 K is :(log2= 0.30)
Question 26
Which one of the following is incorrect for ideal solution?
Question 27
Zinc can be coated on iron to produce galvanised iron but the reverse is not possible. It is because
Question 28
The pressure of H2 required to make the potential of H2-electrode zero in pure water at 298 K is
Question 29
Oxidation numbers of P in , of S in and that of Cr in are respectively,
Question 30
The standard electrode reduction potential of three metals X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be
- 178 attempts
- 3 upvotes
- 7 comments
Tags :
Feb 1JEE & BITSAT