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There are seven students A, B, C, D, E, F and G, who have got highest marks in aggregate in a class. They are ranked as 1 to 7 (not necessarily in the same order). F has neither got highest nor lowest rank. D has got one rank higher than B. There are three students who have got higher marks than C and G is one of them. A has got higher rank than G but not the highest one. Which students have got the highest and the lowest rank?
Consider the following statements: 1. Dynamic cone penetration test for site investigation is based on the principle that elastic shock waves travel in different materials at different velocities. 2. Electrical resistivity method of subsurface investigation is capable of detecting only the strata having different electrical resistivity. 3. In-situ vane shear test is useful for determining the shear strength of very soft soil and sensitive clays and is unsuitable for sandy soil. Which of these statements is/are correct?
Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R.
Which one of the following statements describes the variations most appropriately?
Solid State Physics mcq question image
The electrical resistivity of the material of a conductor is ρ. If its length is doubled and area of cross-section is tripled, then its electrical resistivity will be
The resistivity of ‘X’ decreases with temperature and its coefficient of resistivity is negative. Identify X.
In the electrical resistivity method, the unit of resistivity is ohms-cm.
For better resistance welding, the metal must have
P. high electrical resistivity and low melting point
Q. high thermal conductivity
R. high electrical resistivity and high melting point
S. low thermal conductivity
The resistivity value of a substance is determined by its conductivity. Metals with low resistivity . . . . . . . .
Which of the following statement is incorrect? a) Mt Elbrus is the highest mountain in Europe. b) Aconcagua is the highest mountain in North America. c) Kilimanjaro is the highest mountain in Africa. d) Mt. Everest is the highest mountain in Asia.
There are six dealers - P, Q, R, S, T and U, of electronic appliances who have sold the different number of appliances - 25, 37, 40, 41, 45 and 46 in a particular month (not necessarily in the same order). T has not sold the highest number of appliances but has sold more than P. The number of appliances R has sold is in a multiple of 2. The number of appliances U sold is in a perfect square. Q has sold more appliances than R but less than T. P has sold more appliances than U but less than R. Who among the following has sold the third highest number of appliances?