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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?
Match the following Device Conversion of Energy (a) Windmill (i) Chemical Energy to electrical energy (b) Bulb (ii) Kinetic Energy to Electrical Energy (c) Electrical Cell (iii) Sound Energy to Electrical energy (d) Microphone (iv) Electrical Energy to Light Energy
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
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
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
"It is now expected that the variable production cost per unit and the selling price per unit will each increase by 10%, and fixed production cost will rise by 25%. What will be the new break even point?
Selling price - Rs 6 per unit
Variable production cost - Rs 1.20 per unit
Variable selling cost - Rs 0.40 per unit
Fixed production cost - Rs 4 per unit
Fixed selling cost - Rs 0.80 per unit
Budgeted production and sales for the year are 10,000 units."
What does hydropower change A. Kinetic energy to electrical energy B. Mechanical energy from electrical energy C. Chemical energy to electrical energy D. Wind energy to electrical energy
Which of the following statements are correct for superconductors? 1. A substance loses its electrical resistance below a certain temperature. 2. Superconducting elements have greater electrical resistivity at room temperature. 3. On adding impurities to superconducting elements its transition temperature is increased.
Electrical conductivity is the reciprocal of Electrical resistivity.
Which of the following are methods of calculating goodwill?
1. Average profit method
2. Super profit method
3. Log method
4. Sum of years digit method
5. Capitalisation of average profit method
6. Capitalisation of super profit method
7. FIFO method
Select the correct answer: